Afleveringen
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In his marvelous new book, When Animals Dream: The Hidden World of Animal Consciousness (Princeton UP, 2023), David Peña-Guzmán (SF State as well as the lovely philosophical podcast Overthink) offers up something new in animal studies--"a philosophical interpretation of biological subjectivity." Although we share no linguistic schema with animals there is lots more evidence than just YouTube (octopuses, dogs, signing chimpanzees, brain scans of dreaming birds etc) to suggest oneiric behaviors and underlying mental states occur all over the animal kingdom. So, David discusses with John his interest in using dreaming as a window into consciousness. Here is what it means that we are not alone in our dreams...
David details the "flattening and impoverishing effect on the natural sciences" wrought by 20th century behaviorist paradigms. He also expresses skepticism about the likelihood of AI ever achieving more than a "zombie" state; it now and perhaps always will profoundly differ from animals' varied experiences of our shared world.
The biological commonality that most strikes David is the idea it is logically inconceivable that there might be a dreamer devoid of consciousness or sentience. Dreaming, he argues may be the key to acknowledging animal's "moral considerability"--the right to have their consciousness, sentience and in the deepest sense their standing taken into account. . Finally David admits to a feeling of tragedy in writing this book: he has had to engage with experimentation that crosses boundaries in animal treatment in order to make the case for those boundaries. He understands his decision as tragic because either way--to engage or to ignore the science--would be to lose something.
Mentioned in the episode:
New Wave of "inner space" SF authors who focus on the alien nature of humanity itself: J. G. Ballard, Philip K. Dick, and John's hero Ursula Le Guin.
Recallable Books:
Susana Monso, Playing Possum a newly translated book on the ways that animals mourn their beloveds.
Charles Darwin, Descent of Man and The expression of the emotions in man and animals (both 1872) are two of the crucial 19th century texts begin to think of animals as complete subjects. Charles Darwin as an early theorist of biosemiosis who deserves, Jain and David agree, to be reactivated.
Listen and Read here.
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Recent social and political psychological research indicates that increased access to ancestry testing has strengthened the notion of genetic essentialism among some groups, or the idea that our biology ties us to particular ethnic identities. This can boost a sense of cultural pride and prosocial behaviors among communities that are perceived to be similar. In the worst-case scenarios, however, this phenomenon can contribute to deeper social woes like misinformation, anti-science agendas, and even social hatred among those who believe in racial superiority.
Using research from both the social sciences and the genetics literature as support, Ancestry Reimagined: Dismantling the Myth of Genetic Ethnicities (Oxford University Press, 2023) establishes realistic expectations about what we can learn from our DNA as a foundation for examining the psychological impact of ancestry testing, including the differences between how this information is perceived versus its reality. With this book, Dr. Kampourakis flexes his muscles as an esteemed interdisciplinary science educator and author to challenge these traditional social constructs, using the current genetic testing science as a myth busting tool.
Kampourakis argues that DNA ancestry testing cannot reveal a person's true ethnic identity because ethnic groups are socially and culturally constructed. In 10 accessible chapters, he explains the assumptions underlying the scientific study of ancestry, and the resulting paradoxes that are often overlooked. What the study of human DNA mostly shows is that human DNA variation is continuous, and it is not possible to clearly delimit ethnic groups based on DNA data. As a result, we all are members of a huge, extended family, and not of genetically distinct ethnic groups. What ancestry tests can provide are probabilistic estimations of similarities between the test-takers and particular reference populations. This does not devalue the results of these tests, however, because they can indeed provide some valuable information to people who may not know much about their ancestors. In fact, what the tests are very good at doing is finding close relatives, and this is perhaps why the whole enterprise should be rebranded as family, not ancestry, testing. Ultimately, this book reveals that genetic essentialism, biological ethnic identities, racial superiority, and similar social constructs are scientifically unsupported
Kostas Kampourakis is the author and editor of several books about evolution, genetics, philosophy and history of science, as well as the editor of the Cambridge University Press book series Understanding Life. He teaches biology and science education courses at the University of Geneva
Morteza Hajizadeh is a Ph.D. graduate in English from the University of Auckland in New Zealand. His research interests are Cultural Studies; Critical Theory; Environmental History; Medieval (Intellectual) History; Gothic Studies; 18th and 19th Century British Literature. YouTube channel. Twitter.
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Zijn er afleveringen die ontbreken?
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Francisco Aboitiz is a professor at the Medical School and the director of the Interdisciplinary Center for Neuroscience at Pontificia Universidad Católica de Chile. A History of Bodies, Brains, and Minds: The Evolution of Life and Consciousness (MIT Press, 2024) tells the story of life and nervous systems. It introduces the conceptual framework and terminology of evolution, gives a great overview of our current knowledge and a thorough discussion of open questions.
The first part defines two basic concepts: evolution and life. Surprisingly, we learn that the first definition is more straightforward. If you are challenged by some terminology in the later chapters - like phylogeny, ontogeny, or the different types of homology - it is highly recommended to revisit the definitions in the first chapter.
The story begins in the second part. Chapter 3 introduces multiple theories on how the first cells might have appeared. In the next chapter, these cells start to form more complex, multicellular organisms. Chapter 5 is dedicated to the main characteristics and early history of neurons.
In the third part, we get acquinted with more complex animals. In chapter 6 with the bilaterians, in chapter 7 and 8 with the vertebrates and their nervous system, in chapter 9 with mammals. Chapter 10 provides a deep dive into the neocortex and its role in cognition.
The fourth part of the book is about "a singular ape". Chapter 11 describes the history of primates, focusing on Hominins. It goes into details on various aspects like walking, the growth of brains, toolmaking, and social life. Chapter 12 describes the evolution of vocal communication. Chapter 13 discusses how speech has influenced communication and social life. Chapter 14 explores numerous open questions around consciousness. How to define it? When and how did it emerge in evolution? Which animals are conscious and in which ways? After this long history, chapter 15 arrives in the present and the future. What are some current evolutionary trends? How do cultural and technological changes influence our nervous systems?
In our conversation with Professor Aboitiz, we focused on a few remarkable milestones in this story. For start, he outlined some theories how life might have begun.
Then a huge jump in time followed: How the first mammals appeared and survived in a world dominated by dinosaurs. Professor Aboitiz elaborated on how the brains of mammals differ from the brains of other vertebrates. He described the cerebral cortex, a new part in the mammalian brain. The role of senses changed significantly: The early mammals had worse vision, but better smell, touch, and audition compared to other vertebrates. Changes in the anatomy of the head and neck supported these more developed senses. The enhanced olfactory system is also related to the hippocampus, where some new skills appeared: advanced spatial orientation and short-term memory.
The next milestone we discussed in detail is the appearance of language. Professor Aboitiz shared some fascinating facts about the vocal communication of birds and primates. He explained the connection between toolmaking and language. He described the speech loop and the connection between working memory and talking. He proposes that manual gestures and vocal communication have evolved together, and communication has always been multi-modal.
The last part of our conversation focused on the current and future situation. How culture and technology has changed our nervous system, e.g. how a brain area is particularly involved in reading. Professor Aboitiz also discussed the more recent technological innovations and their effects on society and the environment. He introduced the social projects conducted by the Interdisciplinary Center for Neuroscience. The project RIEN (Robótica Integral Educativa & Neurociencia) facilitates workshops where kids work in teams with rotating roles to build and program robots.
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Which society was the first to domesticate the horse? It’s a difficult question. The archaeological record is spotty, with only very recent advancements in genetics and carbon dating allowing scientists to really test centuries-old legends about where horses came from.
For example, historians argued that the Botai civilization in Kazakhstan provided some of the earliest evidence of horse domestication–only for more recent studies to discover that the Botai domesticated an entirely different species of horse altogether.
Even a lot more recent horse domestication has a less certain starting date, with recent studies suggesting that the Plains Indians domesticated horses at least a century earlier than originally thought.
William T. Taylor is Assistant Professor and Curator of Archaeology at the University of Colorado Museum of Natural History in Boulder. He was part of several archaeological expeditions to test some of the proposed starting points for horse domestication—some of which are portrayed in his latest book Hoof Beats: How Horses Shaped Human History (University of California Press: 2024)
You can find more reviews, excerpts, interviews, and essays at The Asian Review of Books, including its review of Hoof Beats. Follow on Twitter at @BookReviewsAsia.
Nicholas Gordon is an editor for a global magazine, and a reviewer for the Asian Review of Books. He can be found on Twitter at @nickrigordon.
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Dive into the world of animals with Whitney Barlow Robles in her captivating new book, Curious Species: How Animals Made Natural History (Yale UP, 2023). Can corals truly build worlds? Do rattlesnakes possess a mystical charm? What secrets do raccoons hold? These questions reflect how animals have historically challenged human attempts to control nature, particularly during the Enlightenment—a time marked by rigid classifications, colonial exploitation, and the complex interplay between humans and the natural world.
Robles takes us on a journey through four distinct ecological zones: the ocean, underground, curiosity cabinets, and the field. Her exploration reveals a forgotten lineage of empirical inquiry that embraces uncertainty and highlights the tumultuous history of human-animal encounters. This legacy continues to influence modern biologists and ecologists today as they strive to understand the intricate lives of animals.
In a unique blend of history and nature writing, Robles alternates between meticulous research and personal narratives, uncovering the animal foundations of human knowledge. She argues that addressing our current environmental crisis requires us to reflect on the past and recognize the vital roles animals play in shaping our understanding of the world. Join us as we explore the unruly protagonists of 18th-century science and discover why the stories of these creatures are essential to navigating the challenges we face today.
Gloria Maritza Gómez Revuelta is a Doctoral candidate at El Colegio de México and Adjunct Lecturer at the Universidad de Guadalajara (UdeG).
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Many historical figures have their lives and works shrouded in myth, both in life and long after their deaths. Charles Darwin (1809–82) is no exception to this phenomenon and his hero-worship has become an accepted narrative.
Darwin Mythology: Debunking Myths, Correcting Falsehoods (Cambridge UP, 2024) unpacks this narrative to rehumanize Darwin's story and establish what it meant to be a 'genius' in the Victorian context. Leading Darwin scholars have come together to argue that, far from being a lonely genius in an ivory tower, Darwin had fortune, diligence and – crucially – community behind him. The aims of this essential work are twofold. First, to set the historical record straight, debunking the most pervasive myths and correcting falsehoods. Second, to provide a deeper understanding of the nature of science itself, relevant to historians, scientists and the public alike.
Aims to debunk myths and correct falsehoods about Charles Darwin's life and work
Leading Darwin scholars offer new conclusions about the history and nature of science
Accessibly written for readers across many fields including history, philosophy and the sciences
Kostas Kampourakis is the author and editor of several books about evolution, genetics, philosophy and history of science, as well as the editor of the Cambridge University Press book series Understanding Life. He teaches biology and science education courses at the University of Geneva
Morteza Hajizadeh is a Ph.D. graduate in English from the University of Auckland in New Zealand. His research interests are Cultural Studies; Critical Theory; Environmental History; Medieval (Intellectual) History; Gothic Studies; 18th and 19th Century British Literature. YouTube channel. Twitter.
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Why do we eat? Is it instinct? Despite the necessity of food, anxieties about what and how to eat are widespread and persistent. In Appetite and Its Discontents: Science, Medicine, and the Urge to Eat, 1750-1950 (University of Chicago Press, 2020), Elizabeth A. Williams explores contemporary worries about eating through the lens of science and medicine to show us how appetite—once a matter of personal inclination—became an object of science.
Williams charts the history of inquiry into appetite between 1750 and 1950, as scientific and medical concepts of appetite shifted alongside developments in physiology, natural history, psychology, and ethology. She shows how, in the eighteenth century, trust in appetite was undermined when researchers who investigated ingestion and digestion began claiming that science alone could say which ways of eating were healthy and which were not. She goes on to trace nineteenth- and twentieth-century conflicts over the nature of appetite between mechanists and vitalists, experimentalists and bedside physicians, and localists and holists, illuminating struggles that have never been resolved. By exploring the core disciplines in investigations in appetite and eating, Williams reframes the way we think about food, nutrition, and the nature of health itself.
Elizabeth A. Williams is professor emerita of history at Oklahoma State University.
Claire Clark is a medical educator, historian of medicine, and associate professor in the University of Kentucky’s College of Medicine. She teaches and writes about health behavior in historical context.
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Butterflies have long captivated the imagination of humans, from naturalists to children to poets. Indeed it would be hard to imagine a world without butterflies. And yet their populations are declining at an alarming rate, to the extent that even the seemingly ubiquitous Monarch could conceivably go the way of the Passenger Pigeon. Many other, more obscure, butterfly species are already perilously close to extinction. For the last 20 years, Nick Haddad has worked to identify and save some of the rarest butterflies on earth, a quest that has taken him to both surprisingly ordinary and extraordinarily inhospitable areas, including a swampy, active artillery range on a military installation in North Carolina. It has also led him to some surprising conclusions about the best ways to protect these increasingly endangered butterflies.
In The Last Butterflies: A Scientist’s Quest to Save a Rare and Vanishing Creature (Princeton UP, 2019), Haddad profiles five such species – the ones he has determined to be the rarest of all – and takes us into each one’s unique habitat, life cycle, and existential challenges. From the Crystal Skipper, bouncing over sand dunes adjacent to vacation homes on barrier islands, to the Schaus’ Swallowtail, confined to increasingly remote areas of the Florida Keys, Haddad shows how human activities have affected rare butterfly populations. His unexpected conclusion is that leaving them in peace is not a viable option; disturbances, both natural and human-caused, are necessary for the ecosystems that support butterfly populations to thrive. One of the hardest lessons for him to absorb was that to save populations, some individuals have to be killed in the process.
Haddad’s intrepid field work – he describes one of his strengths as “an unusual capacity to tolerate harsh environments - informs the story of each butterfly species. His lab’s effort to collect, quantify, propagate, and ultimately perpetuate, the rarest butterflies has led to increasing awareness of how much more biologists have to learn about their natural histories, and how critical such knowledge is to saving them. In perhaps the most dramatic example of unintended consequences, Haddad’s team discovered that the St. Francis Satyr, a small brown butterfly, was protected by regular artillery fire on the Fort Bragg army installation in southern North Carolina. The resulting fires were one disturbance the St. Francis Satyr needed to sustain viable conditions (dams built by beavers was another). In another twist, it turned out that Haddad’s initial efforts to help the species were having the opposite effect. Yet over time, these discoveries led to lessons that ultimately have helped the St. Francis Satyr and can be applied to other conservation efforts.
The Last Butterflies could be read as a warning, but Haddad’s tone is never dire. The book is infused with enthusiasm for conservation efforts, both now and in the future, and with an admiration for the beauty, fragility, and resilience of butterflies. It is an important book for anyone concerned with biodiversity and conservation issues. It’s also an eye-opening and engaging read for anyone with an interest in butterflies.
Rachel Pagones is chair of the doctoral program in acupuncture and Chinese medicine at Pacific College of Health and Science in San Diego. She is a longtime butterfly enthusiast and is working, slowly, on a fictional book for middle-grade readers about butterfly conservation.
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Do newborns think-do they know that 'three' is greater than 'two'? Do they prefer 'right' to 'wrong'? What about emotions--do newborns recognize happiness or anger? If they do, then how are our inborn thoughts and feelings encoded in our bodies? Could they persist after we die? Going all the way back to ancient Greece, human nature and the mind-body link are the topics of age-old scholarly debates. But laypeople also have strong opinions about such matters. Most people believe, for example, that newborn babies don't know the difference between right and wrong-such knowledge, they insist, can only be learned. For emotions, they presume the opposite-that our capacity to feel fear, for example, is both inborn and embodied. These beliefs are stories we tell ourselves about what we know and who we are. They reflect and influence our understanding of ourselves and others and they guide every aspect of our lives. In a twist that could have come out of a Greek tragedy, Berent proposes that our errors are our fate. These mistakes emanate from the very principles that make our minds tick: our blindness to human nature is rooted in human nature itself.
An intellectual journey that draws on philosophy, anthropology, linguistics, cognitive science, and Berent's own cutting-edge research, The Blind Storyteller: How We Reason about Human Nature (Oxford UP, 2020) grapples with a host of provocative questions, from why we are so infatuated with our brains to what happens when we die. The end result is a startling new perspective on our humanity.
You can find Dr. Berent on Twitter at @berent_iris.
Joseph Fridman is a researcher, science communicator, media producer, and educational organizer. He lives in Boston with two ragdoll kittens and a climate scientist.You can follow him on Twitter @joseph_fridman, or reach him at his website, https://www.josephfridman.com/.
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It was an astounding discovery in the early 1980's that the same genetic sequence, the homeobox, controlled the development of basic body plans across the animal kingdom, whether the result was a flatworm, an octopus, a mouse, or a human. This discovery of the conservation of a key developmental mechanism across phyla and vast stretches of evolutionary time helped launch the interdisciplinary field of evolutionary developmental biology, or Evo-Devo.
In Evolution and Development: Conceptual issues (Cambridge University Press, 2024), Alan Love explains and explores Evo-Devo and the philosophical problems that arise in its pursuit. Love, who is professor of philosophy at the University of Minnesota-Twin Cities, considers such issues as the type of scientific unity that arises from focusing on problem agendas rather than theory, the problem of determining when variation in traits gives rise to a novel trait, and how the identity of features at various levels of biological organization can be explained by particular causal mechanisms.
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In Interspecies Communication: Sound and Music Beyond Humanity (U Chicago Press, 2024), music scholar Gavin Steingo examines significant cases of attempted communication beyond the human--cases in which the dualistic relationship of human to non-human is dramatically challenged. From singing whales to Sun Ra to searching for alien life, Steingo charts the many ways we have attempted to think about, and indeed to reach, beings that are very unlike ourselves.
Steingo focuses on the second half of the twentieth century, when scientists developed new ways of listening to oceans and cosmic space--two realms previously inaccessible to the senses and to empirical investigation. As quintessential frontiers of the postwar period, the outer space of the cosmos and the inner space of oceans were conceptualized as parallel realities, laid bare by newly technologized "ears." Deeply engaging, Interspecies Communication explores our attempts to cross the border between the human and non-human, to connect with non-humans in the depths of the oceans, the far reaches of the universe, or right under our own noses.
Gavin Steingo is Professor in the Department of Music at Princeton University. He is also affiliated with the programs in Media and Modernity, African Studies, and Jazz Studies. Steingo’s research examines sound and music as fundamental features in the construction of global modernity, with research specializations in African music, sound studies, acoustic ecology, and music and philosophy. Methodologically, his work is united by a mode of inquiry where theory, history, and ethnography form part of a shared constellation.
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On Task: How Our Brain Gets Things Done (Princeton UP, 2020) is a look at the extraordinary ways the brain turns thoughts into actions—and how this shapes our everyday lives.
Why is it hard to text and drive at the same time? How do you resist eating that extra piece of cake? Why does staring at a tax form feel mentally exhausting? Why can your child expertly fix the computer and yet still forget to put on a coat? From making a cup of coffee to buying a house to changing the world around them, humans are uniquely able to execute necessary actions. How do we do it? Or in other words, how do our brains get things done?
In On Task, cognitive neuroscientist David Badre presents the first authoritative introduction to the neuroscience of cognitive control—the remarkable ways that our brains devise sophisticated actions to achieve our goals. We barely notice this routine part of our lives. Yet, cognitive control, also known as executive function, is an astonishing phenomenon that has a profound impact on our well-being. Drawing on cutting-edge research, vivid clinical case studies, and examples from daily life, Badre sheds light on the evolution and inner workings of cognitive control. He examines issues from multitasking and willpower to habitual errors and bad decision making, as well as what happens as our brains develop in childhood and change as we age—and what happens when cognitive control breaks down. Ultimately, Badre shows that cognitive control affects just about everything we do. A revelatory look at how billions of neurons collectively translate abstract ideas into concrete plans, On Task offers an eye-opening investigation into the brain’s critical role in human behavior.
Joseph Fridman is a researcher, science communicator, media producer, and educational organizer. He lives in Boston with two ragdoll kittens and a climate scientist.You can follow him on Twitter @joseph_fridman, or reach him at his website, https://www.josephfridman.com/.
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In Model Cases: On Canonical Research Objects and Sites (University of Chicago Press, 2021), Dr. Monika Krause asks about the concrete material research objects behind shared conversations about classes of objects, periods, and regions in the social sciences and humanities. It is well known that biologists focus on particular organisms, such as mice, fruit flies, or particular viruses when they study general questions about life, development, and disease. Dr. Krause shows that scholars in the social sciences and humanities also draw on some cases more than others, selecting research objects influenced by a range of ideological but also mundane factors, such as convenience, historicist ideas about development over time, schemas in the general population, and schemas particular to specific scholarly communities.
Some research objects are studied repeatedly and shape our understanding of more general ideas in disproportionate ways: The French Revolution has profoundly influenced our concepts of revolution, of citizenship, and of political modernity, just like studies of doctors have set the agenda for research on the professions. Based on an extensive analysis of the role of model cases in different fields, Dr. Krause argues that they can be useful for scholarly communities if they are acknowledged and reflected as particular objects; she also highlights the importance of research strategies based on neglected research objects and neglected combinations of research objects and scholarly concerns.
This interview was conducted by Dr. Miranda Melcher whose new book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars.
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Life on Earth is facing a mass extinction event of our own making. Human activity is changing the biology and the meaning of extinction. What Is Extinction?: A Natural and Cultural History of Last Animals (Fordham UP, 2023) examines several key moments that have come to define the terms of extinction over the past two centuries, exploring instances of animal and human finitude and the cultural forms used to document and interpret these events.
Offering a critical theory for the critically endangered, Joshua Schuster proposes that different discourses of limits and lastness appear in specific extinction events over time as a response to changing attitudes toward species frailty. Understanding these extinction events also involves examining what happens when the conceptual and cultural forms used to account for species finitude are pressed to their limits as well. Schuster provides close readings of several case studies of extinction that bring together environmental humanities and multispecies methods with media-specific analyses at the terminus of life.
What Is Extinction? delves into the development of last animal photography, the anthropological and psychoanalytic fascination with human origins and ends, the invention of new literary genres of last fictions, the rise of new extreme biopolitics in the Third Reich that attempted to change the meaning of extinction, and the current pursuit of de-extinction technologies. Schuster offers timely interpretations of how definitions and visions of extinction have changed in the past and continue to change in the present.
Joshua Schuster is an associate professor of English and core faculty member of the Centre for the Study of Theory and Criticism at Western University. He is the author of The Ecology of Modernism: American Environments and Avant-Garde Poetics and co-author of Calamity Theory: Three Critiques of Existential Risk.
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At Every Depth: Our Growing Knowledge of the Changing Oceans (Columbia UP, 2024) takes readers on a journey from California tidepools to Antarctic poles, showcasing myriad efforts to research and protect marine environments. Through insightful interviews, oceanographer Tessa Hill and science journalist Eric Simons offer a compelling exploration of humanity's relationship with the ocean. They shed light on research methodologies, the ocean's importance, and the vital role of indigenous peoples in ocean stewardship.
Tune in to their interview with the New Books Network, where they share stories from how the research came together, how COVID affected their investigation, and what people can do today to build closer relationships with the ocean.
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In Tabula Raza: Mapping Race and Human Diversity in American Genome Science (University of California Press, 2024), Duana Fullwiley has penned an intimate chronicle of laboratory life in the genomic age. She presents many of the influential scientists at the forefront of genetics who have redefined how we practice medicine and law and understand ancestry in an era of big data and waning privacy. Exceedingly relatable and human, the scientists in these pages often struggle for visibility, teeter on the tightrope of inclusion, and work tirelessly to imprint the future. As they actively imagine a more equal and just world, they often find themselves ensnared in reproducing timeworn conceits of race and racism that can seed the same health disparities they hope to resolve. Nothing dynamic can live for long as a blank slate, an innocent tabula rasa. But how the blank slate of the once-raceless human genome became one of racial differences, in various forms of what Fullwiley calls the tabula raza, has a very specific and familiar history--one that has cycled through the ages in unexpected ways.
Duana Fullwiley is an anthropologist of science and medicine at Stanford University. She is the author of the award-winning book The Enculturated Gene: Sickle Cell Health Politics and Biological Difference in West Africa.
Reighan Gillam is an Associate Professor in the Department of Latin American, Latino, and Caribbean Studies at Dartmouth College. Her research examines the ways in which Afro-Brazilian media producers foment anti-racist visual politics through their image creation. She is the author of Visualizing Black Lives: Ownership and Control in Afro-Brazilian Media (University of Illinois Press).
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Today’s book is: At Every Depth: Our Growing Knowledge of the Changing Oceans (Columbia UP, 2024), by Tessa Hill and Eric Simons, which takes readers beneath the waves and along the coasts, to explore how climate change and environmental degradation have spurred the most radical transformations in human history. The world’s oceans are changing at a drastic pace. In response, the people who know the ocean most intimately are taking action for the sake of our shared future. Community scientists track species in California tidepools. Researchers dive into the waters around Sydney to replant kelp forests. Scientists and First Nations communities collaborate to restore clam gardens in the Pacific Northwest. In At Every Depth, the oceanographer Dr. Tessa Hill and the science journalist Eric Simons profile these and other efforts to understand and protect marine environments, taking readers to habitats from shallow tidepools to the deep sea. By sharing the stories of scientists, coastal community members, Indigenous people, shellfish farmers, and fisheries workers, At Every Depth brings together varied viewpoints, showing how scientists’ research and local and Indigenous knowledge can all complement each other to inform a more sustainable future.
Our guest is: Dr. Tessa Hill, who is a professor in the Earth and Planetary Sciences Department at the University of California, Davis. She teaches and researches oceanography and climate change. She is a recipient of the Presidential Early Career Award for Scientists and Engineers and a fellow of the American Association for the Advancement of Science, and she was awarded the Rachel Carson Lecture by the American Geophysical Union.
Our host is: Dr. Christina Gessler, the producer of the Academic Life podcast. She holds a PhD in history, which she uses to explore what stories we tell and what happens to those we never tell.
Listeners may also enjoy these episodes with women in science:
Climate Change Explained
Women in Shark Sciences
This conversation with Dr. Ware about dragonflies
The surprising world of wasps
When Dr. Martin was considering whether to stay or drop out
Welcome to Academic Life, the podcast for your academic journey—and beyond! Join us again to learn from more experts inside and outside the academy, and around the world.
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Carl Zimmer investigates one of the biggest questions of all: What is life? The answer seems obvious until you try to seriously answer it. Is the apple sitting on your kitchen counter alive, or is only the apple tree it came from deserving of the word? If we can’t answer that question here on Earth, how will we know when and if we discover alien life on other worlds? The question hangs over some of society’s most charged conflicts - whether a fertilized egg is a living person, for example, and when we ought to declare a person legally dead.
Life's Edge: The Search For What it Means to be Alive (Dutton, 2022) is an utterly fascinating investigation that no one but one of the most celebrated science writers of our generation could craft. Zimmer journeys through the strange experiments that have attempted to recreate life. Literally hundreds of definitions of what that should look like now exist, but none has yet emerged as an obvious winner. Lists of what living things have in common do not add up to a theory of life. It's never clear why some items on the list are essential and others not. Coronaviruses have altered the course of history, and yet many scientists maintain they are not alive. Chemists are creating droplets that can swarm, sense their environment, and multiply. Have they made life in the lab?
Whether he is handling pythons in Alabama or searching for hibernating bats in the Adirondacks, Zimmer revels in astounding examples of life at its most bizarre. He tries his own hand at evolving life in a test tube with unnerving results. Charting the obsession with Dr. Frankenstein's monster and how Coleridge came to believe the whole universe was alive, Zimmer leads us all the way into the labs and minds of researchers working on engineering life from the ground up.
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If you're interested in memory, you'll find a lot in Memory Makes the Brain: The Biological Machinery That Uses Experiences To Shape Individual Brains (World Scientific, 2021), from cellular processes to unique and interesting perspectives on autism.
Detailed descriptions of cellular processes involved in forming a memory.
Connecting those cellular processes to everyday experiences - like the memorable image of a butterfly seen during a hike decades ago.
Comparisons of plasticity in different brain areas, like cortex, hippocampus, cerebellum.
Comparisons of plasticity and learning in different phases of the human life.
Important milestones in the history of neuroscience. Like Wiesel and Hubel's work identifying the critical period for plasticity, or Huttenlocher's discovery of synaptic pruning.
Up-to-date science and open questions about autism, a wide range of phenomena that seems to be connected both to synaptic pruning and to the funtion of the cerebellum.
An outlook on non-synaptic plasticity.
Professor Christian Hansel starts both the book and the conversation with establishing a very broad definition of memory. Traditionally, a lot of research focused on the "observable outcome" of learning: acquiring new skills, changing behavior. Instead, he defines memory as any event that changes the brain.
The first 2 chapters introduce major discoveries from the 1960s and 1970s. David Hubel and Thorsten Wiesel examined the visual system of kittens. They recognized that it's much more adaptive in a "critical period", ca. 4-8 weeks after birth. Peter Huttenlocher discovered another fascinating phenomena during childhood: synaptic pruning. In the years 2-12, a lot of synapses (connections between neurons) disappear.
Chapter 3 describes the molecular machinery behind all these observations. We'll get to know the terms LTP (long-term potentiation) and LTD (long-term depression), which mean the long-term strengthening and weakening of synaptic connections respectively. We find a detailed description of these processes, incl. the enzymes, neurotransmitters and receptors contributing to them.
Chapter 4 continues examining these processes across the human life span. The (perhaps surprising) conclusion: The machinery for synaptic plasticity is quite similar in a small child an in an adult. What's different is the magnitude of these processes.
Autism is a central topic both in the book and in the Hansel Lab's work. Chapter 5 starts with describing the difficulties of a definition. ASD (autism spectrum disorder) is an umbrella term encompassing several symptoms and intensities. In the last years, it has turned out that low degree of synaptic pruning plays a significant role in multiple forms of autism. We'll see in the next years how the research about synaptic pruning and learning can be used for clinical purposes. Understanding the biological mechanism can also make it easier to relate to some peculiar-sounding symptoms. If we consider that an individual's brain contains an unusually high number of synapses, their reports about unusually intense perceptions suddenly become more understandable.
A thought-provoking chapter is number 6. It describes various experiments with mouse models to study autism-like symptoms. The chapter might also make you reflect about the merits and shortcomings of animal models generally.
The cerebellum was long considered to be the brain area for finetuning movements. Now, it's clear that its repertoire is much bigger. In the interview, Christian describes a hypothesis that the cerebellum has a capability of timing. This in turn makes it a crucial factor in several behaviors beyond sophisticated movements, including speech.
We know a lot about synaptic plasticity and its significance in learning. Chapter 8 tackles the big, open question, what else? Which other processes contribute to memory formation? It presents some hypotheses about intrinsic plasticity.
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A new understanding of memory is emerging from the latest scientific research. In Why We Remember: Unlocking Memory's Power to Hold on to What Matters (Doubleday, 2024), pioneering neuroscientist and psychologist Charan Ranganath radically reframes the way we think about the everyday act of remembering. Combining accessible language with cutting-edge research, he reveals the surprising ways our brains record the past and how we use that information to understand who we are in the present, and to imagine and plan for the future.
Memory, Dr. Ranganath shows, is a highly transformative force that shapes how we experience the world in often invisible and sometimes destructive ways. Knowing this can help us with daily remembering tasks, like finding our keys, and with the challenge of memory loss as we age. What's more, when we work with the brain's ability to learn and reinterpret past events, we can heal trauma, shed our biases, learn faster, and grow in self-awareness.
Including fascinating studies and examples from pop culture, and drawing on Ranganath's life as a scientist, father, and child of immigrants, Why We Remember is a captivating read that unveils the hidden role memory plays throughout our lives. When we understand its power-- and its quirks--we can cut through the clutter and remember the things we want to remember. We can make freer choices and plan a happier future.
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