In this special standalone episode, host Tripp Collins steps out of the standard author interview format to share a story from his own field: ocean wave science. Learn how a 1913 storm in Casablanca, WWII Higgins landing craft, and two Scripps oceanographers led to the mathematical breakthroughs in surf forecasting that made the D-Day landings possible.

Key Highlights:

• The origin of the world's first operational swell forecast in Casablanca and the Azores in 1922.
• Why flat-bottomed Higgins landing boats were dangerous liabilities in waves over five feet.
• How Walter Munk and Harald Sverdrup defined Significant Wave Height and quantified wave growth, decay, and surf transformation under pressure.
• General Eisenhower's 24-hour D-Day delay decision and the unpredicted severe storm that hit two weeks later.

If you prefer a visual experience, you can watch the video version on YouTube with historical charts, diagrams, and photos.

​Chapters:
00:00:00 - Introduction to this special episode on wave science history
00:00:49 - Context on YouTube visuals and inspiration from the movie Pressure
00:02:37 - The practical power of ocean wave prediction for ports, warfare, and surfing
00:03:29 - The 1913 Casablanca swell and early pressure chart analysis
00:05:16 - The Azores field office in 1922 and the first operational swell forecast
00:06:41 - Why early local forecasting methods failed when applied elsewhere
00:07:55 - WWII amphibious landings and the need for universal wave physics
00:09:08 - Early British empirical rules developed by Claude Suthens
00:10:20 - Walter Munk's journey from Austrian skier to Scripps oceanographer
00:12:51 - Army service and Munk's return to Scripps under Harald Sverdrup
00:14:17 - Operation Torch and Higgins boats: Floating shoeboxes in heavy seas
00:16:44 - Spotting the wave height discrepancy for the North Africa invasion
00:18:22 - Building a mathematical model for wind wave growth from weather maps
00:20:12 - Standardizing Significant Wave Height with landing craft coxswains
00:21:49 - Operation Torch in November 1942: Forecasting Casablanca surf
00:23:49 - Training weather officers at Scripps for Operation Neptune
00:24:46 - Balancing tides, moon phases, and surf limits for D-Day
00:26:41 - Maureen Flavin Sweeney's barometric warning and Eisenhower's 24-hour delay
00:28:25 - June 6, 1944: 133,000 Allied troops land on Normandy beaches
00:30:22 - The unpredicted storm 13 days after D-Day and the timing of the invasion window

​Accurate prediction is powerful. In the case of ocean waves, the power to predict wave height, period, and direction at some future time at any location could be an operational advantage when running a port, it could be a tactical advantage in wartime, and it could put you in position to get the cover shot of Surfer Magazine when you score a major swell. However, it was a long and twisty road building up the requisite intimacy with the physics before any kind of predictive power was achieved, and it started just after the turn of the 20th century.

In 1913, the port of Casablanca was rocked by a massive swell. The French-occupied city was growing rapidly from a population of 12,000 in 1907 to 110,000 in 1921, and was one of the most important ports in the region. The damaging swell was not an isolated event, but the culmination of a series of swells that wrecked small craft and rendered the harbor inoperable for months.

While a calamity as such was understood to be a natural act of God, the French government invested in the study of the swell events with the aim of reducing future harm. A man named Gain was assigned to this duty. He examined weather charts, which were synoptic scale maps of atmospheric pressure at sea level over the North Atlantic. The charts showed broad areas of high pressure and low pressure. Wind rushes from areas of high pressure into areas of low pressure, like air rushing out of a pressurized balloon, and the deeper the low, the faster the wind speed. Gain was able to link the appearance of low pressure systems on synoptic weather maps of the North Atlantic to swell events, perhaps the first to show that swell arriving in northwestern Africa originated from the North Atlantic. Further, he showed that different pressure patterns resulted in swells of different character.

This information was the key to unlocking a warning system. The swell formed offshore, far to the west, and propagated towards the coast but would first encounter the Azores, a small island chain about 1,500 km west of Casablanca. Since the swell tended to arrive from the west, the idea was that the swell observed in the Azores would be the same that later impacted Casablanca. Indeed, this was the case. They set up a field office to make visual wave observations in the Azores. Swell observed in the Azores would then take 1–2 days to reach the coast of North Africa, time in which the office could warn Casablanca via telegraph of an impending event. Thus began the world's first operational swell forecast, and the year was 1922.

A researcher summarized the state-of-the-art in 1943, “...with some experience one may become proficient in forecasting the phenomena, at least at Casablanca.” And that was the catch, it was a kind of empiricism that couldn’t be applied elsewhere. For example, even though Bermuda is 1,500 km to the east of the port of Charleston, South Carolina, observing swell in Bermuda is not helpful for predicting swell in Charleston. This is because low pressure systems tend to form off the U.S. eastern seaboard and move east. A storm in Charleston might later impact Bermuda, not the other way around. Therefore, the Azores-to-Casablanca forecast worked because of the typical atmospheric patterns in the North Atlantic. In the mid-latitudes, the prevalent flow is to the east which storms tend to follow, creating swell that also travels eastward. 

Yet, a universal method for surf height prediction was just what was needed as amphibious landings became an increasingly important tactical approach of the Allied Forces during World War II. To accomplish this task, our understanding in three areas needed significant advancement in (1) how waves develop under the influence of wind, (2) how waves propagate, and (3) how they transform over bathymetry. There were some hints about how waves develop. The Beaufort Force Scale was in wide use, which roughly gives a wave height as a function of wind speed, and by the turn of the 20th century scholars knew that space and time might also be important factors for growth of wave heights. On the latter two aspects Captain Charles Bates, a meteorological officer during WW2, later recalled the state-of-the-art leading up to the war “[contemporary] research did not adequately describe how a wave train decayed within distance from its generating area and then, in shallow water, changed into a plunging breaker.” 

In Great Britain, Instructor Commander Claude Suthons was assigned the task of transforming sparse data into rule of thumb. He studied the existing literature and, working by himself, was able to develop some relationships between the effective wave height data and the wind speed. Suthons produced graphs that linked a fetch and duration to a wave height and period. He also estimated a decay rate over space. It was an empirical solution, not a global understanding of how the systems work, but perhaps it could be calibrated for different locations. Under time constraints, he arrived at a practical, engineering-style solution. He characterized the behavior of a system using available observations and hoped nothing happened outside its scope.

The American effort to predict surf was led by two European immigrants. Enter Walter Munk. As a young man, Munk’s primary interest was in outdoor sports, skiing in particular, which there was no shortage of opportunity for in his native Austria. His well-to-do family sent him to prep school in New York to distance him from the sport, in hopes he would fall in line and join the family banking business. Munk tried and failed as a banker in New York, and made his way to CalTech in Pasadena, CA to pursue a degree in physics. In the summer of 1939, the 21-year-old Munk followed a girlfriend to the serene coastal village of La Jolla, just north of San Diego. To afford his stay, he picked up a summer job at the Scripps Institution of Oceanography under director Harold Sverdrup, a 51-year-old Norwegian explorer and pioneering oceanographer. 

The inciting romance faded, but Munk became smitten with the ocean. Munk asked Sverdrup the following summer if, after graduating from Caltech, he could become a PhD student with him at Scripps. Sverdrup hesitated, saying he didn’t know of a single position in oceanography that would open up within the next twelve years. In the 1940s, Oceanographic institutes in America numbered three, Scripps in La Jolla, Woods Hole in Massachusetts, and University of Washington in Seattle, and the positions were so few that you had to wait for someone to die to create an opportunity. Sverdrup wasn’t just trying to dissuade an overenthusiastic youth that he didn’t think would make the cut, he was genuinely concerned that there would be little in the way of prospects for this young man’s future. Munk, for his part, was unfazed. Without hesitation, he replied,  “I’ll take it”. These were early days of oceanography, and Munk liked to say that for some years he made up the whole of the student body at Scripps.

There is perhaps no more idyllic place in America than La Jolla, and Scripps with its beachfront campus was a paradise. Munk had hit the jackpot, except all was not well back home in Europe. Austria had recently been invaded by Nazi Germany. Munk faced a difficult choice, but was compelled to volunteer for the U.S. Army and apply for American citizenship, his oceanographic studies deferred. While his oceanographic compatriots joined the naval reserves, Munk joined the ​​Ski Battalion in Seattle, Washington, for reasons altogether obvious. After serving 18 months and growing frustrated with the lack of action, Munk was discharged at the behest of Sverdrup so that he could return to Scripps. German submarines were picking off U.S. merchant ships seemingly at will. Another Scripps professor, and future director, Roger Revelle was organizing the anti-submarine warfare effort and thought Munk could help.

Munk barely had time to unpack his bags upon arrival to Scripps when Japan attacked Pearl Harbor, and just like that the U.S. had fully entered the fray and discharges from service were no longer possible. Had Munk still been with his ski company he would have deployed to Papua New Guinea, where the ability to ski was not an advantage, and according to Munk his company was “virtually wiped out”. At the very least, his deployment would have set his life on an alternative if not disastrous path, but as it was, Munk found himself in the company of oceanographers when the U.S. entered the war, and this may have made all the difference.

Under an anti-submarine research detail, Munk was whisked off to the Pentagon. At the Pentagon, Munk learned about the plans for Operation TORCH, which was to be the first major offensive by the Allied Forces. The plan involved making amphibious landings in North Africa, with the newly built “Landing Craft, Vehicle, Personnel” boat, often called the Higgins boat after its designer, New Orleans based boat builder Andrew Higgins.

The Higgins Boats were rectangular, rather like a miniature barge. They were transport vessels built for carrying loads of people and equipment to the shore from deeper water. The bow of a Higgins Boat articulates so that upon beaching, the bow is lowered and troops and equipment spill forth. That is, if Higgins Boat first manages to navigate safely to the beach. 

The beaching of the vessel required shallow draft and a relatively flat bottom, which was fine for heavy loads but was a poor design for navigating waves. The much larger “Landing Ship, Tank” actually had tanks that could flood, increasing the draft and improving handling in heavy seas. The Higgins Boat had no such mechanism for increasing stability. Captain Bates was later to describe them as such “...[the] blunt pop-open bows [of the Higgins Boat] made them extremely sensitive to wave action. To a large degree they looked like and behaved like floating shoe boxes.”

Munk flew down to the Carolinas where the US Military was field-testing the Higgins Boats and was able to see them in action. Munk learned some key performance heuristics: the Higgins Boat operated well when the seas were 3–5 feet high. If, however, the waves exceeded 5 ft, the Higgins Boat had a tendency to broach, unintentionally veering 90 degrees. The broadside of the Higgins Boat would become exposed to the surf, and once perpendicular to the oncoming waves, breakers would crash over the side rail and flood the interior. The boats would continue to fill with seawater, with wave after wave breaking over the side, sinking them further. It was only a matter of time until the vessel foundered, spelling disaster for the men and equipment onboard. In short, Higgins Boats were an asset on calm days and a liability in rougher seas. Because of this, they did not conduct training exercises in seas greater than five feet.

A question formed in Munk’s mind: how does the wave climate at the test site in Carolina compare to that of northwest Africa? Gathering what information was available, it turned out that while 5 ft waves were rare in South Carolina, 6 ft was the average winter wave height for the northwest coast of Africa, and wave height often exceeded 6 ft. Munk thought this was a catastrophe in the making: what would happen to the soldiers in these high seas? When the alarmed young scientist brought the deadly discrepancy to the attention of his superiors, he was casually dismissed, “They’ve probably thought of that” meaning mind your business, do what you are told, and don’t ask questions. Who was “They”? It is possible “they” referred to the British prediction method, but Munk came to believe that there simply was no “they”.

Munk, still a student with low rank and non-existent reputation, was not in a position to challenge authority. All the same, he couldn’t shake the thought that the issue of large waves and the Higgins Boat was important, maybe crucial. For amphibious landings to succeed, they would need to know the wave height in advance. If they had wave information in advance of an operation, they could make “go” or “no-go” decisions that would improve the chances of a successful mission. He must have thought he could do it, that he could figure out the problem of predicting waves, because he set about doing it without explicit permission.

In the modern world where the 10-day forecast for any beach on Earth is a click away, it is difficult to imagine but Munk had next to nothing to go off of. He would not have known about Suthons's method, because it was highly classified. Later publications suggest he knew of the Casablanca swell forecast because he used some of the observations from the Azores, but he may not have been aware of how the method worked because the details were published in French.

Otherwise, little was known about wind wave development. Mariners might know the local signs of bad weather. Those unfortunate enough to meet a storm at sea would note the appearance of the sky and clouds or simply watch the glass barometer. As the mercury dropped, it signaled that the winds and the seas were picking up. Similarly, folks at the coast would simply look at the surf. What are the current conditions? Is it safe to launch a boat and fish for the day? If so, let’s hope the conditions don’t take a turn for the worse while we are out there.

With no method for predicting waves and very little understanding about how seas developed in storms, Munk would have to invent the necessary implements whole cloth. And like the Casablanca office, Munk started with synoptic weather charts. Any synoptic scale wave prediction would need to start with these maps, as these were the only accessible large scale data. In this way, Munk could define areas where he knew winds would be blowing.

He knew there had to be some relationship between growth of waves and areas of low pressure on the maps. After months of careful study, he was growing frustrated with his slow progress and his inability to influence the ranking officers. Munk reached out for help. He called his friend and mentor Harold Sverdrup, who dropped everything, took the next flight from San Diego to Washington D.C., and joined Munk at the Pentagon for 3 months of intense work. With Sverdrup by his side, the team made significant progress. Harold Sverdrup had time to contribute because secretive security concerns, initiated by disgruntled Scripps professors, prevented him from obtaining a clearance to work on the submarine problem. Working on the weather problem was only possible because of lobbying on Sverdrup's behalf by Revelle.

Though scant, they found enough data to tune their method, but a problem remained. Some of the data were visual records from trained officers that consisted of wave height and wave period. Other data were novel pen records of waves, which charted the wave height at a single location over time with a resolution of seconds. From the records, they could measure the height and period of each individual wave. How were they to reconcile these two different types of wave observations? 

The answer was given by a coxswain. Each Higgins Boat had a coxswain, a captain and navigator, who was trained in estimating wave heights. Munk consulted with the coxswains training for Operation TORCH. From their reports, he was able to match the coxswains' observations with a statistic of the charted wave heights, but it turned out to be a very particular kind of average. He found the coxswains’ visual estimations were similar to the average of the ⅓ highest waves in a wave record, and he called this the “significant wave height”. Now, there was a single number that could be associated with a sea state.

Sverdrup and Munk now had the means to use all the available data for their mathematical relationship between the weather charts and the wave heights and periods. It was their version of the engineering solution, an empirical relationship that showed how significant wave height increased with wind speed and length of fetch. 

Previous to Sverdrup and Munk, wave height had been characterized as only a function of wind speed, as in the Beaufort Force scale. Sverdrup and Munk’s innovation was quantifying relationships that accounted for the size, intensity, and duration of a storm. 

After the storm moves out of the area or dissipates, the waves can no longer grow. They have reached their maximum height and period. At this point, the waves transition from wind sea to swell. Swell is not influenced by the wind but propagates according to known physical laws of water waves. Their second major innovation, and perhaps less appreciated, was that by applying the dispersion relation, Sverdrup and Munk were some of the first to bridge the gap between the mathematically ideal waves and practical information about real ocean waves. 

The last bit of the Sverdrup and Munk method was what happens in shallow water, where swell interacts with the contours of the bottom, shoaling and refracting and eventually breaking, in short becoming surf. In developing their method, Sverdrup and Munk cemented the concepts of wind sea, swell, and surf into the canon of wave science.

Every part of the method, from the inception of waves to their eventual shoaling and breaking on a beach could be arrived at from weather maps of surface level pressure, the familiar lows and highs, which were widely produced by military meteorologists. 

Now that Sverdrup and Munk were in possession of a workable method, it was time to put it into practice, but there were still the bureaucratic obstacles. It wasn’t just Sverdrup's ability to make progress on tough problems that Munk sorely needed, he also needed Sverdrup’s clout. 

Harold Sverdrup was a student of Vilhelm Bjerknes, one of the first people to apply physics to understand large scale fluid flow, in the process establishing dynamical oceanography and modern meteorology. Sverdrup spent eight years as the scientific director on the sailing ship Maud for Roald Amundsen’s expedition to the North Pole, before accepting the directorship of the Scripps Institute of Oceanography. At that time, Sverdrup was world renowned and a leading authority in oceanography. In short, he was someone who commanded respect and someone the top brass would pay attention to. Sverdrup’s influence got them a seat at the Operation Overlord planning table. 

With their new methods and influence over the schedule, they were instructed to produce a forecast. Their prediction indicated a small window of opportunity, otherwise the waves were too large to operate the Higgins Boats. They decided to run the operation in the narrow window.  

The predictions were accurate enough, the Higgins Boats made it to the beach, and the mission was a success. However, not everything went according to plan. While waves were small during the landings, they began to rise towards the first afternoon, as predicted. The landing craft, already on the beach and in the surf, suffered heavy losses. From Captain Bates:

“By the end 1 of the assault's second day, 9 November 1942, 64% of the 378 landing craft and lighters deployed at Casablanca's Fedala beachhead had broached, stranded or sunk in breakers soon reaching six feet or more in height, a condition persisting for the next two months.” (Atkinson, An Army at Dawn, 2002).”

For the Allied Forces, the subsequent loss of craft combined with the disastrous Operation Jubilee, a failed amphibious invasion of a northern French beach just two months prior, renewed interest in the surf prediction problem. The stakes became dire as an even larger landing was in the works, Operation Neptune. The Allied Commanders were betting everything on this operation and everyone, even at the highest levels, was aware that surf could make or break the next stage of the war. As Roosevelt noted in a message to Churchill dated 3 September 1942, "... bad surf on the Atlantic beaches is a calculated risk."

It wasn’t just that the Higgins Boats needed to make it safely to the shore, but there was to be a 15-week logistical operation of transporting troops, equipment, and supplies over the beaches. The efficiency of the operation depended on the wave conditions, so an accurate prediction would be of tremendous tactical value.

Munk and Sverdrup returned to La Jolla in May 1943. They began to workshop their method with meteorological officers, so-called Weather Warriors, who traveled to California for the training. Officer Charles Bates, already familiar with Suthons’s method for wave prediction, was in attendance. Munk has remarked that he learned so much from the students that at the end of a one-month course, they would have to totally rewrite the curriculum for the next month. And it went on like that, month after month. All in all, they graduated about 100 meteorological officers who were ready to apply the evolved Sverdrup and Munk method. These men and their new skills were shortly to become central in the new offensive effort brewing on the coast of England.

By this time in the War, the Allied Forces had reached a crucial moment. A point that would turn the tide way or another. Operation Neptune, under the command of General Eisenhower, was to be a large-scale assault centered around an audacious invasion of coastal France. A tremendous buildup of troops, ships, aircraft, and equipment began in England in the spring of 1944, the largest of the war. The troops would travel by sea and air across the English Channel, ships would blanket the sea and planes would cover the sky. This grand military plan left no stone unturned when it came to understanding the risks involved. 

Large ships could not deliver troops and supplies to the beach directly. They had to be transported via Higgins Boats. There would be a myriad of landing craft for different purposes, but a typical Higgins Boat would be laden with 30 or more troops. These would be the life-blood of the battle. If the soldiers didn't make it to the battlefield, the battle would be lost before it could be fought. As Churchill stated in his diary, “The destiny of two great empires are seemingly tied up in some God damn things called [Higgins Boats].”
 
Wave prediction was to be central to avoiding catastrophe. Since surf relied on weather, and weather cannot be predicted more than a few days in advance, a rough schedule was dictated by the seasons. The North Atlantic was notoriously rough and stormy in the winter, so they opted for the more placid Summer. The beaches of Normandy would not be complicated by swell from faraway sources, since they generally faced north and were protected by the Cotentin Peninsula to the west. Therefore, wave prediction was simplified to using the local wind speeds, fetches, and durations to give the wave heights and periods.

Waves were not the only factor. A full-moon was desirable in order for pilots to hit targets and drop nearly 13,000 paratroopers in the predawn hours. The Germans, anticipating an amphibious invasion, deployed a dense network of obstacles in the intertidal zone that would disrupt the path of landing vehicles. The tidal range in Normandy is about 20 ft, alternately concealing or revealing 200-300 ft of beach. The Army wanted a high tide, which would minimize the length of beach an infantryman would need to clear. The Navy wanted to go at low tide so that the obstacles would be obviated, and hopefully obliterated, by a vanguard of Army Engineers armed with explosives. The compromise was to time the dawn invasion to coincide with an incoming tide. An incoming tide would help propel the Higgins Boats toward shore, where the tide would be low enough for engineers to blow the obstacles and open a navigable path. The length of the beach would decrease as the morning advanced. To recap the requirements: low tide, occurring just before dawn on a full moon, implying a larger than normal spring tide, in the mild summer season. This severely limited the potential dates. Supreme Allied Commander Eisenhower chose June 5th, 1944.

In preparation, the Royal Navy initiated a Swell Forecast Section. The name “swell” was intentionally misleading, to hide the fact that they were considering landing on beaches protected from the Atlantic swell. The leader of the section, Lieutenant J.H.C. Fulford, RNVR, established a network of 58 wave observation stations covering a large, synoptic area off the coast of western Europe. Four of these stations were newly available analog wave sensors based on recently developed marine hydrophones, an early kind of pressure sensor, the rest were "Mark-I eyeball observations'', a military euphemism for visual observations supplied by His Majesty's Coast Guard.

The coastal observers were instructed to record the height and period of every wave over the course of 3 minutes. The next step was to calculate an average and find the maximum. The average wave height and period and the maximum wave height were communicated back to the Admiralty by code. The Admiralty devised a statistic, halfway between the average and maximum wave height, that they referred to as the “effective wave height”, which, coincidentally, was remarkably close to Sverdrup and Munk's significant wave height. 54 visual stations, making 3 observations daily, resulted in 1,100 wave reports every week, with the hope that the volume of wave measurements would overcome shortcomings due to innate subjectivity. They tested both the British method of Suthons and the Sverdrup-Munk method, and the method of Sverdrup and Munk won out because it was more accurate, and it was “presented in a much more usable fashion”. It was decided that they would use Sverdrup and Munks method fine-tuned with their data and began producing operational forecasts.

As June 5th approached, a joint team of officers from the Royal and American meteorological services made wave predictions based on synoptic weather maps. On June 3rd, the maps indicated the development of a gale in the North Atlantic that was propagating west. They awaited confirmation from weather observers. In Blacksod, Ireland, Maureen Flavin Sweeney, the postmistress, awoke at 1 am to make weather observations. It was her 21st birthday, and fullfilling her duty every hour at that point. Weather observation was then under the post office and Blacksod was the most westerly station in the UK, therefore being the first to register incoming weather systems. In the early morning hours, she measured a drop in air pressure, an uptick in the wind, and a slight drizzle; the first whispers of incoming inclement conditions. These observations were soon backed up by additional stations and all but confirmed an approaching gale. 

The gale was serious, and large waves were predicted in the English Channel. It became obvious that while the tide was optimal, the seas would be too high for the landing craft. However, the following day the seas were predicted to fall to 6 ft, just on the operational limit, and as the gale passed the seas would continue to fall the following days. Eisenhower weighed his options. Everyday, the tidal minima shifted by about 30 minutes. So low tide would occur 30 minutes later on June 6th. This was no longer ideal, but was still workable, while a delay to June 7th would imply a full hour shift in low tide no longer in line with dawn. The next pre-dawn low tide didn’t occur for another 14 days, but this would be a new moon, not great for the pilots, but most of all Eisenhower was terrified of losing the element of surprise. For Eisenhower, the best two options were either to go on as planned or delay 24 hours. He pushed back the invasion by one day.

Once Eisenhower made the decision, a juggernaut had been set into motion and there was no turning back. With disaster on his mind, he anxiously drafted a resignation letter to President Truman.

About 10 miles offshore of the French coast and well before sunrise, American and British troops began to load into Higgins Boats that hung like life-raft off the side of the large battleships. The Higgins Boats were lowered to deck level and, 30 at a time, soldiers clambered across a gangplank into the small boats. Once laden with crew, the Higgins Boat would be lowered into the ocean under the direction of a coxswain who manned the engine. As predicted, the wave height had dropped but remained balanced on the knife edge. The rough seas were a shock to many. They were unsettled by the wet and cold and struggled against sea-sickness, vomiting into bags and discarding them into the sea. It was a miserable start, but they were alive and this meant they had a chance. This was to be the first of many perils for most troops making amphibious landings, because almost all the 133,000 troops would make it to the beach.

June 6th, 1944 became known as D-Day, and it was perhaps the most crucial turning point in the war against the Nazis. It is no exaggeration to say this moment, this single decision to delay the invasion, a decision weighted by waves, changed the world.

Prime Minister Winston Churchill in a speech to the House of Commons said, “Operation Neptune was the most complicated and most difficult that has ever taken place. It involves tides, winds, waves, visibility both from the air and the sea standpoint, and the combined employment of land, air and sea forces in the highest degree of intimacy and in contact with conditions which could not and cannot be fully foreseen.”

Foresight was exactly what the method of Sverdrup and Munk gifted the Allied Forces. For the rest of his long life, Munk remained humble about his role “We were not doing wave prediction but lucky extrapolation from inadequate data''. However, in 1965 Prof. Blair Kinsman of Johns Hopkins University gave Munk’s work the proper gravitas “There are some thousands of World War II Veterans alive today who would have been dead in the surf had Sverdrup and Munk not done their best with what they had”. Munk took great pride in this quote, and rightfully so.

Eisenhower’s appreciation for the performance of the day can be summed up thusly: “Andrew Higgins ... is the man who won the war for us. ... If Higgins had not designed and built those LCVPs, we never could have landed over an open beach. The whole strategy of the war would have been different.” 

This story is incredible on its own, but what happened shortly after D-Day takes it from the realm of victory through ingenuity and ingeniousness and perhaps some luck to one approaching pure cosmic fate.

While the conditions were not ideal, Eisenhower felt a distinct pressure to go on the 6th in order to maintain the element of surprise. Had they not gone on the 6th, the next opportunity was not for another two weeks, owing to the fact that the landings needed to happen on a particular phase of the fortnightly tidal cycle. 

Eisenhower was convinced that the ever snooping Germans would discover their plans in the intervening two weeks, and so he pushed in the chips on the 6th. While we can not know if they would have been found out if they had delayed, we do know the loss of Higgins Boats could have been catastrophic. A massive storm, entirely missed by the meteorologists, hit exactly 2 weeks after D-Day. Being based on the pressure maps produced by the meteorologists, the surf prediction would have indicated benign conditions. As it was, when the storm hit the newly installed infrastructure for transporting troops and supplies, known as the Mulberry harbors, was totally disrupted and many ships were destroyed and abandoned. Upon hearing about the havoc wreaked by the storm on D-Day +13, Eisenhower said “I thank the gods of war we went when we did.” As it was, Eisenhower’s resignation letter remained unsent.

Carl Zimmer, science journalist and author, discusses his fifteenth book, Airborne: The Hidden History of the Life We Breathe. Zimmer’s career includes two decades of science reporting for the New York Times and early editorial work at Discover magazine.
​
Airborne documents the science of aerobiology and the historical refusal by public health institutions to recognize airborne disease transmission. The conversation highlights the neglected epidemiological research of William and Mildred Wells, the fragmented nature of atmospheric sciences, and how the complex realities of scientific validation collide with public policy during global health crises.

• [00:00:35] - Tripp introduces Carl Zimmer and the concept of aerobiology in Airborne.
• [00:01:04] - Zimmer defines the atmosphere as an active, living habitat rather than an empty void.
• [00:02:05] - The origin of Airborne stems from Zimmer's COVID-19 reporting for the New York Times.
• [00:07:48] - Zimmer details his shift to historical research and uncovering unexamined records at the Rockefeller Archive Center.
• [00:11:12] - Zimmer explains his non-linear writing process and the realities of managing long-term book deadlines.
• [00:13:10] - The extensive editing required to trim tangents, utilizing Charles Lindbergh's 1933 atmospheric sampling as an example.
• [00:17:06] - The persistent silos within aerobiology that complicated the global understanding of COVID-19 transmission.
• [00:19:58] - The necessity of rigorous fact-checking and extensive citations in scientific literature.
• [00:25:18] - The historical dominance of miasma theory in ancient disease transmission models.
• [00:29:48] - How the rise of germ theory led to a strict dogma rejecting airborne infection.
• [00:33:32] - Mildred Wells' pioneering but obscured research on ultraviolet light disinfection in schools.
• [00:37:28] - The messy reality of the scientific process and the difficulty of establishing compelling evidence for policy changes.
• [00:43:31] - A rapid-fire assessment of COVID-19 facts, masking efficacy, and the lab-leak origins debate.
• [00:53:36] - Zimmer provides advice for aspiring science writers regarding topic selection and formatting.
• [00:59:35] - Upcoming projects, including a new podcast focused on the science of aging and healthspan.

• CarlZimmer.com
• Carl Zimmer's page at the New York Times and Yale University​
• The Future of Ageing Podcast
• More Books from Carl

• Breasts: A Natural and Unnatural History by Florence Williams

• [00:00:00] - I introduces Chelsea Wood and her middle-grade book exploring the hidden world of parasites.
• [00:01:20] - Wood defines a parasite as an organism that lives in or on a host and inflicts a long-term fitness cost.
• [00:03:12] - The conversation explores the fluid ecological boundaries between parasites, commensals, and mutualists.
• [00:05:24] - Wood clarifies why our own bodily cells are not considered parasites, emphasizing the biological necessity of species distinction.
• [00:07:07] - Parasites are contextualized as ancient, naturally evolved organisms rather than recent environmental anomalies.
• [00:08:07] - Wood recounts the book's origin story, which began when a publisher heard her discussing research on NPR.
• [00:11:04] - The pedagogical challenge of adapting rigorous undergraduate parasite ecology lectures for an elementary-level audience is detailed.
• [00:14:34] - Wood discusses the critical role of illustrator Dave Mottram in making biologically accurate parasites visually engaging for children.
• [00:19:33] - Wood shares the story of her academic pivot from aspiring marine biologist to dedicated parasitologist.
• [00:23:16] - The highly complex, three-host evolutionary life cycle of the Lancet Liver Fluke is broken down.
• [00:27:36] - Wood explains the r-selection evolutionary strategy, detailing why parasites produce massive amounts of offspring to guarantee survival.
• [00:32:55] - Toxoplasma gondii is highlighted as a globally successful parasite capable of actively manipulating rodent and human behavior.
• [00:37:52] - The behavioral manipulation of California killifish by marine trematodes is shown to inadvertently support local bird conservation.
• [00:41:51] - Wood addresses the hidden ecological crisis of parasite extinction driven by human-caused habitat degradation and overfishing.
• [00:49:42] - Wood previews her upcoming 2027 adult-focused book, Netherworld, which investigates the future trajectory of global parasitism.

Chelsea Wood Official Website
UW Faculty Page

Beyond the science, we delve into the human side of research and the personal sacrifices involved in field work. Drawing on our shared experiences of working abroad, and we reflect on how studying deep time provides a humbling perspective on our own lives. Whether discussing the literal taste of dinosaur bones or the ancient smell of prehistoric lakebeds, this conversation emphasizes that science is a powerful tool for connection, both with each other and with this our only home, the Earth.

• 02:19–02:53 Intro: Tripp introduces Strata as a gift of "intimacy with a place" and asks for a definition of the field.
• 02:53–04:43 Defining Strata: Laura explains strata as layers of sediment (silt, clay, sand) that turn into a "rock record" over millions or billions of years.
• 05:01–08:35 The Geologic Lens: Laura discusses her transition from a Princeton lab manager in South Australia to a science "translator" and journalist.
• 10:23–11:24 John McPhee Influence: A discussion on modernizing the tradition of geology writing and the inspiration of Basin and Range.
• 11:44–12:47 Visuals: Laura explains commissioning illustrator Sarah Gilman to create immersive "worlds" for the book's four main sections.
• 13:11–14:22 Lyric Preludes: Why Laura uses "lyric preludes"—poetic yet factually accurate introductions—to set the scene for each era.
• 14:28–17:06 Writing Rituals: The benefit of morning routines and why writing by hand provides "spaciousness" and a sense of calm.
• 18:01–20:51 Deep Time Scale: Using an arm-span analogy to show that human history is just a "pinky fingernail" on the 4.5 billion-year timeline.
• 21:35–23:29 The Air Section: A look at the Great Oxygenation Event and how oxygen was initially a "toxic" gas that triggered mass extinctions.
• 24:08–27:23 The Evolution of Mud: How the rise of land plants 458 million years ago stabilized soil, created floodplains, and allowed for human civilization.
• 28:02–31:15 Rocks as Stories: Why stratigraphy offers "drafts of stories" rather than concrete answers, requiring scientists to be "willing to be wrong."
• 33:55–36:07 Personal Sacrifice: A candid look at the "glamorous but difficult" reality of field work and being away from family during personal loss.
• 36:44–37:57 Mindfulness in Science: Laura describes geology as a contemplative practice that requires "breathing in and out" while noticing the ordinary.
• 42:11–43:12 The Ediacaran Period: If she had a time machine, Laura would visit the first visible, non-single-celled life forms at the bottom of the ocean.
• 43:21–44:42 Sensory Geology: Practical field tips: why dinosaur bones "stick" to your tongue and how ancient rocks still smell like prehistoric lakes.

​Join me for a special one-year anniversary celebration of Book Science as I sit down with biologist and author Sönke Johnsen to discuss his beautiful new book, Into the Great Wide Ocean: Life in the Least Known Habitat on Earth.
In this episode, Sönke takes us on a journey into the pelagic zone—the open ocean that makes up the vast majority of living space on our planet. We explore why this "unbearably beautiful" world looks like it is lit by blue LEDs, the evolutionary marvels of transparency and bioluminescence, and the immense challenges of studying creatures that are effectively invisible.

Sönke shares his philosophy on science communication, explaining why he chose to weave his personal memoir—from his childhood in Pittsburgh to his time on research submersibles—into a text about marine biology. We discuss the "physical pain" of the writing process, why humanizing scientists is essential for public trust, his awesome illustrator Marlin Peterson, and the deep connection between artistic observation and biological discovery.

Plus: We dive into the "observer effect" of deep-sea research (and why trawling nets is like driving a bulldozer through a café), the spiritual awe of biodiversity, and why Sönke believes that conservation must be driven by love rather than shame.

• 00:00 – Introduction and One Year Anniversary of Book Science.
• 01:45 – The Pelagic Environment: Why the open ocean is "unbearably beautiful."
• 04:40 – Writing for the Public: Moving away from the "omniscient scientist" trope.
• 07:50 – The physicality of books vs. digital media.
• 09:30 – Balancing memoir with hard science.
• 15:30 – The Writing Process: "Thought made manifest."
• 18:50 – Art in Science: Using illustrations to understand form.
• 22:20 – The interconnectedness of life and the "miracle" of existence.
• 26:50 – Bioluminescence: How animals use light for defense, predation, and communication.
• 34:00 – The Unknown: Why admitting ignorance is vital for scientists.
• 38:15 – Conservation: "We save what we love."
• 44:30 – Advice for science writers.

Full Transcript Here 

Duke University Faculty Page

Science Book

Fiction

More Books:

• ​Micrographia by Robert Hooke
• The Open Sea by Alister Hardy

​Welcome to season 2!  We are finally back in action, and no better way to kick it off then with an incredible interview with author Dan Flores. In this episode, I speak to Dan about his most recent book 'Wild New World: The Epic Story of Animals and People in America'. The conversation covers the sweeping, emotional narratives within the book that highlight the historical interactions between humans and animals in North America. Dan discusses his inspiration, the challenges of condensing 65 million years of history into a readable narrative, and how living in natural settings influences his writing. We touch upon significant topics like extinction events, the evolution of American wildlife, and the role of literature in shaping our understanding of nature. The episode also delves into Flores' perspective on conservation efforts, the cultural impact of recognizing human roles in extinction, and an intriguing discussion about the revival of ancient species through genetic engineering.

00:00 Introduction to 'Wild New World'
02:31 Author's Background and Writing Environment
06:21 Inception and Scope of the Book
11:13 Challenges in Writing 'Wild New World'
17:01 The Epic Timeline of North American Wildlife
24:42 Human Presence and Extinctions in North America
34:52 Reflecting on Changing Attitudes Towards Extinction
35:13 The Myth of a Perfect World
37:59 Confronting Extinction: The Great Auk
39:00 Human Impact on Global Extinctions
40:42 America's Unique Wilderness and Conservation Efforts
41:52 The Role of Science in Conservation
44:17 The Endangered Species Act and Political Unity
45:32 Nature as Common Ground in a Divided World
48:11 The Fascination with Extinct Animals
49:17 The Science of De-Extinction
54:46 Influential Books on Nature and Conservation
01:00:34 Personal Stories and Future Projects
01:04:01 Conclusion and Final Thoughts

Full Transcript Here

Also See 

• More books by Dan Flores
• Colossal Biosciences (Company Website)
• American West (podcast)
  
• Book Science Book Shop

Full Transcript Here.
We’ve reached the end of Season One of Book Science! In this closing reflection, I look back on the challenges, the guests who made the season possible, and the growth—both personal and creative—that came from finally putting this project into the world.

From my very first conversation with Duane Hamacher to laughing it up with Scott Huler in Episode 8, this season has been full of experiments, stumbles, and a whole lot of learning.
Along the way, we explored:

• Episode 1: Duane Hamacher – The First Astronomer
• Episode 2: The Power of the Sea by Bruce Parker (solo)
• Episode 3: Tessa Hill & Eric Simons – At Every Depth
• Episode 4: Firmament by Simon Clark (solo)
• Episode 5: Lynne Kelly – The Knowledge Gene &n others
• Episode 6: Helen Czerski – Blue Machine & Storm in a Teacup
• Episode 7: Waves and Beaches by Willard Bascom and Kim McCoy (deep dive)
• Episode 8: Scott Huler – Defining the Wind & Delicious Country

I’m deeply grateful to every guest who took a chance on this unknown show, and to everyone who has listened. Thank you for being part of this first season. With your support, this small but mighty club of science book aficionados will only keep growing. See you in Season Two.

Looking Ahead: Season Two launches this October! Guests include Carl Zimmer (Airborne), Dan Flores (Wild New World), Laura Poppick (Strata), Rebecca Lexa (Everyday Naturalist), Kevin Walsh (Planets of the Known Galaxy), Sönke Johnsen (Into the Great Wide Ocean), and Chelsea Wood (Power to the Parasites).

Links & Extras

• Website: TrippCollins.com
• Show notes & transcripts: https://www.trippcollins.com/episodes
• Instagram: @booksciencepodcast
• Patreon (support the show): patreon.com/bookscience
• BookShop.org Book Science Season 1 Collection

Author Websites

• Scott Huler
• Helen Czerski
• Tessa Hill
• Eric Simons
• Duane Hamacher
• Lynne Kelly
• Simon Clark
• Bruce Parker​

20:00–30:00

• Scott explains how he moved from journalism into book writing via feature stories.
• The Beaufort book was initially rejected by his agent.
• During a period of isolation, he applied for a fellowship to revisit the idea.
• New agents became interested, and the proposal gained traction.
• A fellowship and book deal gave him the resources to pursue the project fully.

30:00–40:00

• Scott describes the transformative year spent at a fellowship in Ann Arbor, fully immersed in writing without distractions.
• He contrasts the depth and time required for books versus articles—books must offer beauty, complexity, and multiple angles.
• Compares the form of a book to natural units of human understanding, like a Beethoven symphony on a CD.
• Praises the physical book as a “perfect technology”—interactive, durable, portable, and deeply familiar.
• Emphasizes his lifelong love of books, recalling his identity as a bookish kid.

40:00–50:00

• Scott says writing should be fun—even with serious topics, he wants readers to enjoy the experience.
• He’s drawn to science because it’s structured, cumulative, and leads to results.
• Describes science as “beautiful, magical, and understandable”—it enables modern life.
• Reflects on the evolution of scientific understanding, from Newton to Einstein to quantum physics.
• Criticizes science denialism (e.g., about climate change) as a refusal to engage with objective reality.

50:00–60:00

• Scott shares the emotional experience of tracking down historical records tied to the Beaufort scale.
• He visited the UK Met Office and saw handwritten observations but never found a full personal archive.
• A choreographer created a dance piece based on his book—he read the Beaufort scale aloud during the performance.
• Readers have created their own Beaufort scales (e.g., for laundry or in prison), which deeply moves him.
• He compares the spread of these creative responses to having kids—his ideas continue without him.

60:00–70:00

• Scott recounts paddling Lawson’s route and realizing Lawson likely wasn’t paddling himself—he was being guided.
• Emphasizes that Lawson’s journey relied entirely on Native American guides and established paths.
• Notes that Lawson was unusually aware that he was witnessing the decline of Native cultures, not their peak.
• Highlights Lawson’s respectful, detailed descriptions of Native life—plants, food, rituals, and more.
• Praises Lawson’s empathy and commitment to documenting what he saw with care and honesty.

70:00–80:00

• A Native American woman told Scott that reading Lawson in college was life-changing—“he gave me my history.”
• She introduced Scott to her tribe’s land and longhouse, the first their people had owned in a century.
• Encounters like this reaffirmed his commitment to the work, regardless of book sales.
• Scott emphasizes he wasn’t trying to retrace every step, but to follow Lawson’s method of observing and documenting.
• Frames the journey as a modern transect—adding new data to Lawson’s original record.

80:00–90:00

• Scott compares Lawson’s journey to the Odyssey—both are human stories of striving and transformation.
• He sees Lawson’s journey as witnessing a pivotal cultural moment—one that led directly to conflict and Lawson’s death.
• Lawson was trusted but also complicit in colonization; Scott highlights this moral complexity.
• Draws a parallel between Lawson’s time and today—both marked by upheaval and existential uncertainty.
• Notes the reality of climate change and extinction, questioning what kind of future remains.

Scott's website: ScottHuler.com
Some of Scott's articles:
Inside the Weird and Wonderful World of Miniatures (for Esquire)
Opinion: Trump isn't just betraying the Constitution, he's betraying the Declaration of Independence ​

Willard Bascom’s Waves and Beaches first appeared in 1964 and quickly became a classic of coastal and wave science. Favored by readers who wanted to dig deeper into the physics of waves, it has stood for decades as a clear and engaging introduction to the subject.
​
But the new third edition? It wipes out. The wave science remains largely outdated, and new sections insert climate commentary that doesn’t reflect the current state of research. If you want to learn more, check out the episode. For some bonus material that didn't make the cut, read on.

​Let’s talk about a pair of figures; one from the original 1964 edition of Waves and Beaches and one from the new third edition. I will describe them, but please look below and check them out. The comparison tells you everything you need to know about the 3rd Edition.

The original figure is a classic conceptual representation of the ocean’s wave energy spectrum, first produced by Walter Munk in 1951. It’s a single continuous curve plotted against timescales from hours down to seconds. Bascom labeled each section according to the type of water wave that corresponds to that period: tides at the hour mark, wind-generated ripples at the second mark. The y-axis reads “relative amount of energy present.” This isn’t a measured spectrum, but a conceptual one, the height of line represents the relative importance of different kinds of wave motions. There’s a clear peak for swell and sea, reflecting the fact that wind waves dominate ocean surface energy in most places most of the time.

The fact that the line is continuous is conceptually important. It shows that ocean waves form a spectrum across scales. While there may be a separation in scales between ripples and tides, there is often no clear difference between wind seas and swell. The categories of wind sea and swell are just convenient labels; there are no sharp boundaries in nature. 

Now, compare this to the updated figure in the third edition. Instead of a continuous curve, we get a series of discrete bubbles. The y-axis is labeled “change in sea level,”. What does “change” even mean here? Is it absolute change, variation, or something else? The units of the y-axis are in terms of length [m]. But a wave spectrum isn’t a plot of raw heights, it’s a distribution of variance with frequency or period, and its proper units are variance density, typically [m²/Hz]. This isn’t a trivial detail, the caption still calls this a “wave spectrum,” which it clearly is not. This shows a fundamental misunderstanding of what a spectrum represents.

The x-axis still represents periods with units of time (note the axis has been flipped), but now runs from fractions of a second to millennia. There are little bubbles for capillary, ripples, chop, sea, swell, etc. To me, this implies that these should be separate, discrete phenomena, which is wrong. Beyond tides, we have “seasons,” “El Niño,” "sunspot cycle" (what!?), and even a bubble labeled “industrialization.” If I’m generous, I’d interpret that last one as sea level rise from post-industrial warming, but the figure gives no explanation. In fact, since the y-axis begins with msl (mean sea level) you might assume we are talking about variations in reference to the mean sea level, but anything beyond tsunami is variations of the mean sea level. Then we have Milankovitch cycles on scales off 100k years? Even if these are periodic phenomena, they are not ocean waves (if this needs to be stated), and on these scales the ocean basins and sea levels change, rendering msl meaningless.

What was once an elegant conceptual diagram showing the continuous nature of ocean waves has been replaced with a careless hodgepodge that reveals a fundamental misunderstanding of what water waves are and what a spectrum represents.

Climate change is real, important, and worthy of serious discussion, but climate is not a wave. A book like Waves and Beaches exists to define and explain physical phenomena in the natural world with clarity and accuracy. When that mission is abandoned, when metaphor is confused with mechanism, and sloppy language replaces careful explanation, it does more than misinform. It undermines public understanding of science at a time when precision and trust matter most. That is the real failure of this new edition.

Full Transcript Here.

0:00 – 8:00

• Introduction to the episode and why this review is different from your usual positive tone.
• Waves and Beaches (1964) introduced as a classic of wave science by Willard Bascom.
• Background on its origin in Scientific American articles and the Science Study Series.
• Brief history of editions: 1st (1964), 2nd (~1980), and 3rd (2023, Patagonia).
• Praise for Bascom’s original—accessible, descriptive, and beloved for decades.
• Criticism begins: The 3rd edition feels like a picture book with little connection between text and images.

8:00 – 16:00

• Bascom’s influence: only popular-level wave science book for decades; alternatives too technical.
• Comparisons to Susan Casey’s The Wave (different audience, more surf-focused).
• Bascom’s background: mining, the Waves Project, nuclear test measurements, Project Mohole.
• His reputation as a provocative public communicator (example: waste disposal in oceans).
• Bascom’s writing as readable and poetic, a major reason for the book’s legacy.
• Questions arise: Why was McCoy chosen for this edition, and who is he?

16:00 – 24:00

• McCoy’s background: few publications, mostly in ocean instrumentation, and self-mythologizing stories.
• Criticism of the edition’s lack of updated wave science—ignores advances in spectral modeling, GPS buoys, and satellite observations.
• McCoy’s two main contributions: forced climate-change insertions and personal adventure anecdotes.
• Example of incoherent climate writing: “The wave of climate change is another very long wave…”
• Your argument: Climate science belongs, but McCoy’s treatment is shallow and confusing.
• Contrasts in tone: Bascom’s clear, textbook-like writing vs. McCoy’s tall tales and poor analogies.

24:00 – 32:00

• Extended critique of McCoy’s climate discussions as unscientific and buzzword-heavy.
• Example: “We have become part of the spectrum”—a meaningless metaphor in context.
• ENSO confusion: McCoy conflates climate oscillations with literal ocean waves.
• Exasperation at editing failures: questionable sections published without fact-checking.
• Praise for Bascom’s fieldwork descriptions: his transition from lab theory to real-world wave observation still resonates.
• McCoy’s interludes occasionally entertaining (stellar navigation story) but likely embellished.

32:00 – 40:00

• The notorious blender analogy: comparing ACE (tropical cyclone energy) to blender settings—debunked in detail.
• Discussion of climate attribution: you consult Dr. Kevin Walsh, who clarifies what science actually says about storms.
• Walsh’s insights: detection vs. attribution, observed vs. projected trends in tropical cyclones.
• Current consensus: fewer total storms, stronger intense storms, higher rainfall rates, and storm surge worsened by sea level rise.
• Critique of McCoy’s misunderstanding of basic wave physics (e.g., fetch-limited growth in cyclones).
• Beach change mischaracterized as “permanent,” which misunderstands coastal dynamics.

40:00 – 47:00

• Broader frustration: lack of curiosity and scientific rigor in McCoy’s writing.
• Humorous but telling critique of his reckless approach—likened to his free-diving story.
• Suggestion that Patagonia prioritized making a coffee-table book rather than a serious science update.
• Acknowledgment of Bascom’s enduring value—recommend reading 1st or 2nd editions instead.
• Appreciation for Bascom’s poetic lines and communication style; “go and see” highlighted as a motif.
• Closing thanks to Dr. Kevin Walsh and invitation to explore show notes and further discussion.

Helen Czerski is an Associate Professor at the Department of Mechanical Engineering at University College London and her research focus is the physics of breaking waves and bubbles at the ocean surface. Since 2011 she has presented a wide range of science documentaries for the BBC on the physics of everyday life, and atmospheric and ocean science. She currently co-hosts BBC Radio 4's flagship climate and environment show, Rare Earth. She is also a central member of the Cosmic Shambles Network. 

Helen is also a science writing hero of mine. I read and loved both Storm in a Teacup: The Physics of Everyday Life (2016) and Blue Machine: How the Ocean Shapes our World (2023).

Blue Machine in particular is a masterclass in science writing. It is epic in scope, the prose is beautiful, the tone is inviting, and it gets the science storytelling balance right: not getting bogged down in details and not flying over the important bits. 

The comparison that comes to mind is Rachael Carson's The Sea Around Us. These days, Carson is remembered for Silent Spring, which jump started the environmental movement in the United States by exposing the detrimental impact of synthetic pesticides such as DDT. But before Silent Spring, Carson wrote not one but three books about the ocean. The Sea Around Us was her oceanic magnum opus, covering all of oceanography that was known up unto the point of publication 1951, which had recently bloomed in the post-war era. This was an ambitious project pulled off with Carson’s signature panache. I see The Blue Machine as the heir to Carson's throne in this tradition. Czerski really pulled off something amazing, a book with elegant prose, ambitious scope, bubbling enthusiasm, and in the end inspirational, simply put this is oceanic storytelling at its finest.

Full Transcript

Welcome and Introducing Helen Czerski (0:00–5:00)

• I open the show from Melbourne, acknowledging the Wurundjeri people of the Kulin Nation.
• Introduce Book Science as a podcast about how science books are written and why they matter.
• Introduce Dr. Helen Czerski — physicist, oceanographer, BBC presenter, author, and bubble expert.
• Highlight Helen’s background, from explosives physics to ocean science.
• Frame Blue Machine as a major achievement in ocean science writing — compared to Rachel Carson.
• Emphasize the book’s invitation to see the ocean as a powerful, knowable system.

Seeds of Blue Machine (5:00–10:00)

• I ask Helen about a passage in Storm in a Teacup that hints at Blue Machine.
• Helen describes the evolution of the book idea — how it developed over years of curiosity.
• Discusses physics as patterns in the world and the public’s misunderstanding of the discipline.
• Pushback against the elitism of physics — a defense of intuitive, everyday understanding.
• Framing the ocean as a life support system alongside the body and civilization.

Why Write a Book? (10:00–15:00)

• Helen reflects on why she waited until she had “something to say.”
• Critique of performative communication — the importance of contribution over attention.
• Insight into writing as thinking — the book forces deeper articulation of ideas.
• Discomfort with social media’s shallow engagement and desire to fill space without substance.
• The value of earned authority and the responsibility of taking up a reader’s time.

Structure, Storytelling, and Perspective (15:00–20:00)

• I ask Helen about the structure of Blue Machine, citing the “Russian doll” chapter on dead water.
• Helen explains her organic approach to structure — built from nested ideas.
• Emphasizes the universality of physics and the joy of finding patterns across contexts.
• Science writing as perspective-sharing, not just explanation or fact delivery.
• The goal is to leave readers with a mental model — a scaffold for future knowledge.

Curiosity, Cinematic Writing, and the Joy of Play (20:00–25:00)

• We talk about the playful, invitational tone of Helen’s writing.
• Adults are encouraged to stay curious — science is not just for children.
• Anecdote: a reader tempted to push toast off a hotel table to test physics.
• I describe Helen’s scenes as cinematic — she credits her TV work with that skill.
• Discusses Cosmic Shambles' “boring photo” advent calendar — finding wonder everywhere.

Why Books Still Matter + What’s Next (25:00–30:00)

• Helen shares her deep love for books as immersive tools for perspective transfer.
• Books are the most powerful medium for mind-to-mind communication across time.
• We discuss Cosmic Shambles as a curiosity-driven community without snobbery.
• Helen highlights the value of indigenous and non-Western perspectives on the ocean.
• Quick mentions of her BBC Radio 4 series Rare Earth, new book ideas, and summer science festivals.
• I thank Helen and encourage listeners to explore her books and online work.