Science History Podcast

No matter our claims to the contrary, we are all biased in our perceptions and beliefs. But bias is not random and its directions relate to our evolutionary history and culture, especially to how these interface with human sociality. With us to decipher bias is Jim Zimring. Jim is the author of What Science is and How it Really Works, published by Cambridge University Press in 2019, and Partial Truths: How Fractions Distort Our Thinking, published by Columbia University Press in 2022. Today we discuss flawed thinking about fractions, the No True Scotsman Fallacy, what we see when we read, heuristics, stories vs. statistics, confirmation bias, the prosecutor’s fallacy, cherry picking, tautology, hindsight bias, the Bible code, the fine-tuning argument, armor on WWII bombers and the Anthropic Principle, and the reproducibility crisis.

The oceans have been used as the dumping grounds for all manner of toxic waste. Outrage over such dumping led to the Marine Protection, Research, and Sanctuaries Act of 1972 in the United States and the London Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter in 1975. Today I discuss the dumping of DDT and other wastes off the coast of Southern California with Dave Valentine. Dave completed a BS in chemistry and biochemistry at the University of California San Diego in 1995, followed by an MS in chemistry also at UCSD the following year. He then completed MS and PhD degrees in earth system science at the University of California Irvine in 1998 and 2000. Dave is now the Norris Presidential Chair in Earth Science at UC Santa Barbara. He has participated in 25 oceanographic expeditions, including 13 as chief scientist.

Many landmarks of environmental history share a connection with a single molecule: DDT. During and after the Second World War, it was broadcast into the environment at a scale that far surpassed the applications of any prior chemical. The public met this mass spraying of DDT with enthusiasm, as the war proved it to be highly effective against the vectors of malaria, yellow fever, typhus, and other insect-borne diseases. But these public health successes were short-lived as insects quickly evolved resistance. Nevertheless, DDT use skyrocketed around the world, especially in agriculture. It was also used on a massive scale in forestry, in the Sisyphean fight against invasive insects, and in the home, where clever companies impregnated all manner of commercial products with DDT, ranging from bug bombs to house paint to wallpaper for the nursery. Due primarily to its massive impact on the environment, but also to effects on human health, a backlash ensued, driven most forcefully by Rachel Carson’s 1962 book Silen

At the start of the 20th century, physicists probed the structure of nature. Their discoveries changed our fundamental understanding of matter, of life, and of war. At the center of these discoveries stood the Danish physicist Niels Bohr. Bohr approached problems of atomic structure and quantum theory with a philosophical perspective and an ability to skirt paradoxes with his principle of complementarity. Perhaps as important as Bohr’s discoveries on the atom was his hosting of international collaborations at his institute in Copenhagen, which in turn led to fundamental insights in physics and chemistry. Bohr also played significant humanitarian and diplomatic roles during World War II in Denmark, Sweden, the United Kingdom, and the United States. Many Jewish refugee scientists passed through Bohr’s institute after escaping Nazi Germany, and Bohr then facilitated their immigration to safe harbors. With us to decipher Bohr’s complex legacy is John Heilbron. John is a member of the International Academy of the

The advent of agriculture over 10,000 years ago forever altered the trajectory of humanity. Communities grew larger until cities and nations dotted the landscape, labor became specialized, new diseases emerged, civilizations flourished and vanished, warfare increased in scale and lethality, and people colonized every corner of the globe. Agriculture facilitated the exponential growth of the human population, which necessitated ever greater efficiency and productivity and eventually led to the industrialization of farming. But this efficiency has come at a cost – the loss of crop varieties and the local knowledge and cultural practices associated with those crops. With us to understand these radical changes in agricultural practices, and their implications for society, is Helen Anne Curry. Helen is an Associate Professor in the Department of History and Philosophy of Science at the University of Cambridge and a fellow of Churchill College. Her research focuses on the histories of seeds, crop science, and indus

The brain is the most mysterious and complex organ of the body, and when things go awry, we may be confronted with personal tragedy and we may gain insights on what it means to be human. With us to discuss neurological disorders and the history of their discovery is Sara Manning Peskin. Sara completed an AB in biochemistry at Harvard University in 2009, an MS in cellular and molecular biology at the University of Pennsylvania in 2013, and an MD also at U Penn in 2015. She completed postgraduate training and a fellowship in various aspects of neurology also at U Penn, where she is now an Assistant Professor of Clinical Neurology. Today we discuss a cornucopia of neurological disorders, including Huntington’s disease, Alzheimer’s disease, Lewy body dementia, Pick’s disease, pellagra, and kuru disease (and its association with cannibalism) – all drawn from the pages of her new book, A Molecule Away from Madness, published in 2022 by W.W. Norton & Company.

Nothing is so intertwined with human success and folly as economics. The economy, for better or for worse, drives much of our fate from our household budget to our national policies to the outbreak of war. But economic activity also has profound effects on the environment and a close inspection of economics opens the question of whether humans can live sustainably on the only planet we have. The field of economics that focuses on sustainability and the environmental costs of economic activity is ecological economics. With us to discuss this field is one of its founders, Herman Daly. Herman received a B.A. in economics from Rice University in 1960 and a PhD in from Vanderbilt University in 1967. He was a professor of economics at Louisiana State University until 1988, and then served as senior economist in the environment department of the World Bank until 1994. He then joined the faculty at the University of Maryland in the School of Public Affairs. Herman is the author of over 100 articles in professional jo

The 60s hosted the space race between the United States and the Soviet Union, which occurred in the midst of the Vietnam War, the Cold War, and civil unrest. How did the culture wars of the 1960s relate to the space race, especially in the United States? How did the Civil Rights Movement, the New Left, environmentalism, the women’s movement, and the Hippie counterculture influence NASA, and vice versa? With us to answer these questions is Neil Maher. Neil received a B.A. in history from Dartmouth College in 1986, an MA in U.S. history from New York University in 1997, and a Ph.D. in history, also from New York University, in 2001. He is a professor of history in the Federated History Department at the New Jersey Institute of Technology and Rutgers University, Newark, where he teaches environmental history, political history, and the history of environmental justice. Neil has received numerous fellowships, awards, and grants from the Smithsonian Institution, NASA, Harvard University’s Charles Warren Center for

Today’s episode marks the four-year anniversary of the Science History Podcast, where we have explored all manner of science and relevant policy spanning from gravitational waves to bioterrorism. So it is fitting that today’s guest, Dick Garwin, has worked on just about every major scientific and technology problem with a defense application since just after the Second World War, ranging from the first thermonuclear weapon in 1951 all the way to the U.S. response to pandemics. Today we discuss it all, including space nuclear detonations and electromagnetic pulses, spy satellites, anti-submarine warfare, sequential memory for computers, magnetic resonance imaging, laser printers, touch-screen monitors, nuclear weapons testing, nuclear reactor accidents, Ebola, the Iraq War, the BP Deep Water Horizon oil spill, and even gravitational waves. Dick was born in Ohio in 1928. He received a BS in physics from Case Institute of Technology in 1947 at the age of 19, and then a Ph.D. in physics from the University of Chi

Today we explore the history of nuclear disarmament with Zia Mian. Zia is a physicist and co-director of Princeton’s Program on Science and Global Security, part of the School of Public and International Affairs, where he has worked since 1997. His research interests include issues of nuclear arms control, nonproliferation and disarmament, and international peace and security. Zia is co-editor of the journal Science & Global Security, and he is the co-author of Unmaking the Bomb, published by MIT Press in 2014. He is also co-chair of the International Panel on Fissile Materials. Zia received the 2014 Linus Pauling Legacy Award for “his accomplishments as a scientist and as a peace activist in contributing to the global effort for nuclear disarmament and for a more peaceful world.” He also received the American Physical Society’s 2019 Leo Szilard Award “for promoting global peace and nuclear disarmament”. In 2021, Zia was elected a Fellow of the American Physical Society for “promoting global nuclear risk

How do we distinguish real science from hogwash? How does real science evolve over time into pseudoscience? Why will science always be plagued with sister movements on the fringe that make us cringe? With us to explore these topics and their relationship to the demarcation problem is Michael Gordin. Michael is the Rosengarten Professor of Modern and Contemporary History and the director of the Society of Fellows in the Liberal Arts at Princeton University. He specializes in the history of modern science in Russia, Europe, and North America, especially issues related to the history of fringe science, the early years of the nuclear arms race, Russian and Soviet science, language and science, and Albert Einstein. He is the author of On the Fringe, which we discuss today, as well as The Pseudoscience Wars: Immanuel Velikovsky and the Birth of the Modern Fringe, Scientific Babel: How Science Was Done Before and After Global English, and Red Cloud at Dawn: Truman, Stalin, and the End of the Atomic Monopoly. Today w

Uncertainty is inherent to science and exploited by those who wish to stymie regulations that would promote environmental quality and public health. Chemical companies, oil companies, tobacco companies, and many others, kept their products on the marketplace and promoted consumerism by stressing the unsettled nature of research. With us to explore this history, and how it relates to the environment and public health, is Mark Lytle. Mark is among those historians seeking to develop the field of “Environmental Diplomacy.” The author of The Origins of the Iranian-American Alliance, 1941-1953, he began his career as a student of American relations with Iran and the role of oil in postwar foreign policy. Since then, in his books America’s Uncivil Wars: The Sixties Era from Elvis to the Fall of Richard Nixon and The Gentle Subversive: Rachel Carson, Silent Spring, and the Rise of the Environmental Movement, he has focused on the history of the 1960s and environmentalism. His interest in history education inspired t

The study of wildlife has a history full of adventures in remote corners of the Earth, discoveries of remarkable behaviors, and achievements in conservation. George Schaller is a pioneer of the field, with seven decades of work spanning from the Arctic to the Tropics. George was born in Germany in 1933 and immigrated to the United States as a teenager. He received a BS degree from the University of Alaska in 1955 and a PhD from the University of Wisconsin, Madison in 1962. He then held positions at Stanford University and Johns Hopkins University before working as a research associate for the Rockefeller University and New York Zoological Society’s Institute for Research in Animal Behavior, beginning in 1966. This program evolved into the Center for Field Biology and Conservation, where George worked as the Coordinator. Beginning in 1979, George directed the New York Zoological Society’s International Conservation Program. George’s many awards reflect his impacts on the conservation of wildlife and ecosystems

The history of science is punctuated by both the greatest achievements and the greatest tragedies of human endeavors. The development of organic chemistry illustrates this dichotomy, as some scientists improved the human condition while others facilitated the horrors of genocide. The guise of chemistry also has served as a useful front for fraudsters. With us to illuminate chemical accidents, brilliant discoveries, searing evils, and the use and misuse of organic chemistry is Joe Schwarcz. Joe was born in Hungary in 1947. His family escaped to Austria during the 1956 Hungarian uprising, and from there immigrated to Quebec. Joe received BS and PhD degrees in chemistry from McGill University in 1969 and 1973. He held various faculty positions before joining the faculty at McGill in 1980. Joe is the Director of McGill’s Office for Science and Society, which has the mission of separating sense from nonsense. He is well known for his informative and entertaining public lectures on topics ranging from the chemistry

The history of mathematics extends back millennia. The needs of trade, taxation, and time-keeping drove the development of principles of arithmetic, algebra, and geometry, which had already acquired some sophistication by 5,000 years ago. Perhaps most fundamental to the development of mathematics has been discoveries on the nature of numbers themselves, or what mathematicians refer to as Number Theory. Today’s topic is the history and development of Number Theory, viewed through the lens of numbers and number systems. Our guide to Number Theory is Bryden Cais, professor of mathematics at the University of Arizona and the Director of the Southwest Center for Arithmetic Geometry.  Bryden completed a BA in mathematics at Harvard University in 2002 and a PhD also in mathematics at the University of Michigan in 2007. He was a postdoctoral fellow at McGill University, a visiting scholar at Universität Bielefeld, and a professor at the University of Wisconsin, Madison before joining the faculty at the University of

The most important book in the history of mathematics is Euclid’s Elements. The book – really 13 short books bound together into a single treatise – dates to approximately 300 BC, and is credited to the Greek mathematician Euclid of Alexandria. It is apparently a compendium and expansion of the work of previous Greek mathematicians, such as Pythagoras, Hippocrates of Chios, and Eudoxus of Cnidus. The Elements is the oldest surviving logical treatment of mathematics as a discipline, and its theorems and constructions are central to the history of scientific discovery and logic. It is likely that only the Bible has been issued in more editions than the Elements since the invention of the printing press. With us to discuss the Elements, and its importance to the development of geometry, is David Acheson. David completed his bachelor’s degree in math and physics at Kings College, London, in 1967, and his Ph.D. in math at the University of East Anglia in 1971. He then held a variety of academic positions and becam

Galileo occupies an inflection point in the history of science and society. Born in 1564, Galileo changed the trajectory of science though his work in astronomy, physics and related fields. He invented various clever devices, and he used the telescope to push the boundaries of knowledge about our solar system and Earth’s place in it. Galileo’s discoveries, and the manner in which he presented them in his 1632 book Dialogue Concerning the Two Chief World Systems, hurled his fate into the judgements of the Roman Inquisition. Galileo recanted after he was found “vehemently suspect of heresy”. The inquisitors sentenced Galileo with the unusual punishment of house arrest, where he remained until his death in 1642. The Dialogue represented much more than a book on Copernican heliocentrism – that is, that the Earth rotates daily and revolves around the sun. The Dialogue also became a cudgel in the European conflicts between Catholics and Protestants, and the fate of the book in the midst of the Inquisition placed Ga

The creation of a new discipline based upon a single scientific expedition is a rare occurrence, but this is what resulted from the 1872-1876 expedition of H.M.S. Challenger. With us to explain the history and significance of the Challenger Expedition is Doug Macdougall. Doug is a geochemist who received a BS in geology from the University of Toronto, an MS in geology from McMaster University, and a PhD in Earth Sciences from the Scripps Institution of Oceanography at the University of California, San Diego. After a two-year postdoc in physics at the University of California, Berkeley, Doug returned to Scripps to serve on the faculty. He is now an emeritus professor of Earth Sciences. Doug is a fellow of the Meteoritical Society and the American Geophysical Union. Today we discuss his book Endless Novelties of Extraordinary Interest – The Voyage of H.M.S. Challenger and the Birth of Modern Oceanography, published by Yale University Press.

In the early 1990s, scientists discovered that sperm counts in industrialized countries had declined precipitously over the previous half century. It turns out that the incidence of other reproductive health problems beyond male infertility also increased in the latter part of the 20th century and into the 21st century. With us to discuss human reproductive health, and how it has changed in part due to exposure to pollutants, is Shanna Swan. Shanna received her BS in mathematics at the City College of New York, her MS in biostatistics at Columbia University, and her PhD in statistics at the University of California, Berkeley. She specializes in Environmental and Reproductive Epidemiology, and is a Professor of Environmental Medicine and Public Health at the Icahn School of Medicine at Mount Sinai, New York. Shanna investigates how prenatal and early childhood exposure to stressors, including chemicals commonly found in the environment, impact the reproductive health and development of children. Today we discu

The boundaries of science are clear, and can be demarcated by the concept of falsifiability. Or so we learn in our science classes. But with some areas of science, falsifiability is not the critical feature, and may be impossible on theoretical or empirical grounds. Worrying about falsifiability might even get in the way of interesting ideas. With us to discuss the history of problems in science and falsifiability is Sean Carroll, a leading physicist and science communicator. Sean received a BS in astronomy and astrophysics from Villanova University in 1988, and a PhD in astronomy from Harvard University in 1993. He is a research professor of theoretical physics at the California Institute of Technology and an External Professor at the Santa Fe Institute. His research interests include cosmology, astrophysics, and general relativity. Sean regularly appears in the media to discuss science, and he is the host of the podcast Mindscape. He is also the author of popular science books, including From Eternity to He