Discovering Darwin

Informações:

Sinopse

A website dedicated to the podcast Discovering Darwin.

Episódios

  • Season 5 Episode 6: Gender Bender

    15/03/2024

    In this final episode of Season 5, Sarah, Mark, and James discuss the last chapters from Lucy Cooke's book Bitch: On the female of the species. Sarah described the sex lives of barnacles and encouraged us to watch the Green Porno episode that illustrates the impressive size of a barnacle penis. Image from https://bodegahead.blogspot.com/2017/06/a-long-reach.htmlThe conversation considered why Charles Darwin did not include barnacles in his Descent of Man, and Selection in Relation to Sex. Sarah suggested it would not fit nicely in his narrative on male and female roles in sexual selection. We then discussed how clown fish, which can shift their sexual identity from male to female, challenge the notions of sexual identity. Photo: Amanda Cotton/Coral Reef Image BankMark recounted Lucy Cooke's biologically accurate retelling of Finding Nemo which results in a story that would not get a G rating.  James questions if the term Gender is only relevant to humans, since we seem consumed with i

  • Season 5 Episode 5: Hot Orcas and Superfluous Males

    05/11/2023

    In this episode Sarah, Mark and James continue their discussion of the book Bitch by Lucy Cooke where they explore menopause in humans and non-human animals and discuss those animals that have forwent males when they reproduce. The first conversation explored how orcas are an unusual mammal in that the males do not disperse from their mother's pod, but instead they retain a close relationship with their mothers. The ultimate momma's boy. Sarah discussed the various hypothesis for why women would actually go through menopause, and why it is an evolutionary puzzle. One of the hypothesis that Sarah thought had traction was the fact that human women at birth reduce their one million oocytes to about 300,000 at birth, and the number and quality of eggs continue to decline with age. The oocytes of a human female in stasis awaiting the monthly opportunity to develop into a fertile egg.We discussed why it is the female orca that experiences menopause and not the males. We finished the podcast discussing sin

  • Season 5 Episode 4: Ken the Naked Mole Rat

    24/09/2023

     In this episode Sarah, Mark, and James continue their coverage Bitch by Lucy Cooke. We discussed systems where female aggression was common and the subjugation of other females and males was done by "alpha" females.  We were surprised to learn how murderous and violent naked mole rats and sweet little meercats could be. Photo from Akron ZooNaked mole rats are eusocial mammals where a dominant female is the sole reproducer in the colony and others help rear the young. Here is a photo of a queen rat with her newborn pubs and other females assisting in their care. Do not be fooled by the serene nature of this image, those helper females are violently coerced into their roles.Photo from https://lsc.org/news-and-social/news/our-naked-mole-rats-had-babiesagainMeercats are also a fossorial social mammal that is ruled ruthlessly by the dominant female. The play of meercats often mimics fighting, which is always a constant possibility in their tight knit clan.The second half of the discussion focu

  • Seson 5 Episode 3 - Variable Vaginas and Punchable Penises

    25/07/2023

    We continue our discussion of Lucy Cook's book entitled Bitch: On the female of the species focusing on chapters 5 & 6 which covered variation in female genitalia, the evolution of the human penis,  and maternal care. We spent some time talking about the baculum, a bone that is found in the penis of many mammals, but not in humans. Sarah described how intricately shaped the baculum of squirrels can be, as evident in the image below. From Bacula of North American Mammals by W. H. Burt, 1960Sarah also discussed a novel hypothesis presented by Jakovlic'  that proposes and explanation for the loss of human baculum through male-male aggression. James wondered why human copulation lasts so long? What is the point of all that thrusting for minutes on end?  We explored a couple of hypothesis that have been proposed to explain the exuberant level of pelvic thrusting typical in human copulation. James encouraged our listeners to look at the NSFW artwork of Jamie McCartne

  • Season 5 Episode 2: Your O face

    22/06/2023

     In this episode we continue our conversation based upon Chapters 3 & 4 of Lucy Cook's book Bitch: on the female of the species. We started off the conversation doing a deep dive on the famous Bateman experiment that purported to reveal 3 principles concerning variation in male and female reproductive success and how those differences drive sexual selection. After reviewing the experiments and what they were reported to show, Sarah then discussed some more recent papers that closely re-analyzed the original 1948 experiment and how that revealed critical flaws and biases in the study which weakens the strength of its conclusion.   We were left with thinking it is more Bateman Hypothesis than Bateman's Principles. Once we established that it is not correct to characterize females as being coy and unwilling to mate more than once, we explored the reasons why females would exhibit a level of promiscuity that rivals that expected from males. We discussed the orgasm as a feature in sexu

  • Season 5 Episode 1-Incubated in misogyny

    04/05/2023

    We have returned from a long hiatus to discuss a wonderful book entitled Bitch: On the Female of the Species by Lucy Cooke. Sarah asked James and Mark to read this book that gives an updated look at Darwin's original model of sexual selection, a topic we covered extensively in Season 4. In this episode we cover the introduction and first 2 chapters of the book.In our conversation about the book, we discuss how Darwin's stereotypical, and simplistic. views of male and female roles in mating and reproduction have persisted 150 years later. As Sarah says, we are still suffering from the hangover Darwin's misogyny. Chapter one of the book does a great job challenging the simplistic notion of what "is a female?", and we explore that topic in detail. Mark was enamored with the existence of gynandromorphs (gyn=female, andro=male, morph=form), organisms that exhibit both male and female phenotypic structures. This led us to discuss the difference between sex and gender and why the simplistic view, often exp

  • Season 4 Episode 10: Darwin is WRONG! Click here to learn more

    27/11/2022

    In this final episode of Season 4, Mark, Sarah, and James finally critiqued Darwin's analysis of secondary sexual characteristics in humans and his clumsy attempt to apply his model of sexual selection in explaining the diversity of forms in what Darwin called "races" and we call geographically distinct phenotypes (GDPs). We found that Chapters 19 & 20 of Descent of Man distilled and concentrated Darwin's most ethnocentric and sexist observations and pseudo-scientific explanations concerning the differences between the sexes and GDPs. Image from Wilson, Miller, and Crouse (2017)Sarah made the argument that human sexual dimorphism, differences in size and body form of males versus females, is the smallest of all seen in extant primates. Sarah questioned why Darwin tried to assign those slight differences to sexual selection. James made the argument that there are two categories of traits that Darwin was discussing. James referred to the physical traits, like hair color, skin color, height, facial shap

  • Season 4 Episode 9: Love Antics and Conspicuous Ornamentations

    10/10/2022

     After a long COVID induced hiatus, we have returned to tackle the meaty middle of Charles Darwin's magnum opus The Descent of Man. It was actually most of Volume 2, three hundred and nineteen pages of anecdotes, observations, wild conjecture, and chuck'splaining his crazy system of inheritance. The dense plodding Victorian prose was diluted, a bit, by the amazing woodcut prints of beetles, fish, lizards, exotic birds whose feathers were stolen by Victorian women, and ornamented antelopes and other mammals. Human female adorned with decorative feathers stolen from birdsMark covered the fish, amphibians, and reptiles, since James forgot to assign the invertebrates, we did not discuss the myriad beetle examples Darwin discussed. However, Mark was impressed with the ways in which fish, during the breeding season, become so brightly colored. We mentioned a local fish, the male rainbow darter, which is quite striking during the spring breeding season. Mark was surprised to learn that there is no such thi

  • Season 4 Episode 8: Sexy time and selection

    07/07/2022

     In this episode we dive into Chapter 8 from Darwin's Descent of Man. James incorrectly attributed this chapter to the end of Volume I of the two volume set but it is actually the first chapter of Volume II, which makes more sense given its dramatic shift in focus and topic. Sarah tried to get us to differentiate between adaptive traits that come about from sexual selection with those that come about from natural selection.  Photo from https://rollingharbour.com/2017/02/14/bluehead-wrasse-private-life-laid-bare/We spent some time discussing the difference between sex-linked traits, like calico cat color,  and sexually selected traits like the giant antlers on the extinct Irish Elk.  James presented just a few hypothesis that have been proposed to explain female choice of traits and why those traits that females seem to prefer are often opposed by natural selection. It is hard to be a red male cardinal in the dead of winter. Sarah suggested interested listeners read The Evolution of Be

  • Bonus Episode - Are Angels moral?

    13/06/2022

     image from:https://www.artsales.com/ARTistory/angelic_journey/index.htmlIn this bonus episode we return to our conversation with our favorite ex-monk philosopher friend Dr. Jack Furlong where he discusses whether angels, as described in scripture, could actually be moral.  We then briefly discuss the Yale baby lab where clever behavioral experiments are done on human babies to see how early they exhibit cognitive decision making. We hope to be back in the studio to record a complete episode out soon. 

  • Season 4 Episode 7: We are Many, We are One

    10/05/2022

     In this episode we finally confront Chapter 7 of Descent of Man,  entitled On the Races of Man. In this  chapter Darwin discusses the races of humans and outlines the scientific arguments of the time that questioned if humans are more than one species.  These arguments, of course, were based upon racist European views of the people from the lands their countries had colonized. Race is a social construct, not a biological identity, and we discussed why that is the case in this episode.  https://angelicadass.com/photography/humanae/James Wagner's daughter participated in this awesome art project and she is included in the images above.At one point we noted that Darwin reintroduced the idea of a range of varieties of organisms that can interbreed along a geographical range, but the ends of the ranges were reproductively isolated. We introduced that idea, often called a ring species, in Season 1 Episode 3, which can be found here. Sarah loves her ectoparasites and their evoluti

  • Season 4 Episode 6: Your Inner Sea Squirt

    06/04/2022

    Mark, Sarah, and James discuss Chapter 6 of Charles Darwin's Descent of Man. In this chapter Darwin unequivocally declares humans evolved from ancestral primate stock and that event occurred in Africa. We discussed how prescient Darwin was in interpreting the biology and scant fossil record in determining human relationship in the evolutionary tree. (Image credit: Nick Hobgood/Wikimedia Commons)We discussed at length this problematic paragraph:The great break in the organic chain between man and his nearest allies, which cannot be bridged over by any extinct or living species, has often been advanced as a grave objection to the belief that man is descended from some lower form; but this objection will not appear of much weight to those who, convinced by general reasons, believe in the general principle of evolution. Breaks incessantly occur in all parts of the series, some being wide, sharp and defined, others less so in various degrees; as between the orang and its nearest allies—between the Tarsius and

  • Season 4 Episode 5: I am Jack's morality

    19/02/2022

    In this episode we enlist a different Furlong, Dr. Jack Furlong, to help us untangle morality and determine if there really is such a thing as big M morality, as Sarah calls it. <spoiler alert>  Jack, after a very in depth explanation, says "No". Jack invokes the classic Trolley thought experiment to illustrate why various historical positions on morality stumble when confronted with the scenario and asks which big M morality system should be employed when resolving the trolley dilemma. Jack also challenges the view that morality in humans is either unique or exceptional. We also discussed how morality may show up in non-human animals and Jack cleared up for James the proper term to use when referring to more than a single octopus.  We also discussed if an octopus would have morality. https://www.theguardian.com/environment/2019/may/12/octopus-farming-unethical-and-threat-to-food-chainThe opening and closing theme to Discovering Darwin is "May" by Jared C. Balogh.Interlude music

  • Season 4 Episode 4: Big M morality &c

    07/12/2021

    In Chapter 4 Darwin begins to sketch out his views on how complicated human behaviors, like sacrifice, empathy for others, and group defense would evolve when selection would favor us to act otherwise.Chapter 4 is entitled Comparison of the Mental Powers of Man and the Lower Animals - continued, but the short title at the top of the page is Moral Sense, which suggests what Darwin really thinks he is discussing. although he never clearly defines morality Mark shares with us a couple of definitions of morality and notes that Darwin hints at the idea that morality is actions that we feel we ought to do, not necessarily what we want to do. Later in the chapter Darwin entangles into the concept of morality ideas of choice, doing things that are not innate, and having a sense of what others expect of us, and us wanting to avoid disapprobation from our social group.We discussed altruistic and defensive behaviors exhibited in social animals and asked if those actions were actually moral. Here is an image of a baboon

  • Season 4 Episode 3: Civilised as much as a dog

    18/10/2021

     In this episode we discuss Chapter 3: The Mind from Darwin's Descent of Man. We are joined by a very special guest - Dr. Ellen Furlong from Illinois Wesleyan University who studies cognition in dogs. In this chapter Darwin spends some time going through a litany of traits that he associates with intelligence. His goal is to get the reader to recognize that humans, although very intelligent, are only different in degree and not in kind when compared to other animals. The list of traits Darwin thought indicated intelligence were:CuriosityImitationAttentionMemoryImaginationReasonProgressive ImprovementTools and weapon useAbstractionSelf-consciousnessLanguageSense of BeautyComplex emotions Belief in God, superstition, etc.Darwin started off the discussion clarifying the difference between instinct and intelligence and noted some researchers proposed that instinct and intelligence are an inverse ratio to each other, the more your behaviors are dictated by instinct the less intelligence, as defined

  • Season 4 Episode 2: Absolutely useless faculty

    14/09/2021

      In this episode we discuss Chapter 1 of Descent of Man and are joined by a special guest - Evolutionary developmental (EvoDevo) biologist Dr. Belinda Sly. Darwin spends the chapter documenting how human bodies show the scars from evolution past. Darwin takes two approaches in convincing the reader that humans are modified from "lower forms". In one approach he discusses how humans share ailments, diseases, and parasites with other animals. The argument of homology. The second argument Darwin uses is cataloging the various rudimentary, vestigial, and nascent structures humans have and how they are present and useful in other animals.Sarah highlighted the homology argument that Darwin used - the fact that humans share diseases and parasites with other animals, showing the similarity of our bodies with other animals - by discussing the diversity of human lice - head, body, and pubic lice. After explaining the differences between each, Sarah helped us understand how they are used to identify important poin

  • Season 4 - Episode 1: The most interesting problem for the naturalist

    11/08/2021

     https://commons.wikimedia.org/This is the first episode of Season 4 where we begin our exploration of Charles Darwin's Descent of Man, and Selection in Relation to Sex which was published in 1871. In this episode we explore how Darwin finally got around to discussing the evolution of humans, a topic he avoided in Origin of Species even though he told Alfred Wallace it was "...the highest & most interesting problem for the naturalist." In creating the book he relied on a wide array of scientists, citizen scientists, and bureaucrats in collecting the wide array of facts he uses to support his claim that humans are just another animal and we have evolved like any other organism. We discussed what the social, political, and scientific climate was like when Darwin was publishing this book and how it was received by his friends and enemies alike. https://www.darwinproject.ac.uk/henrietta-emma-darwinSarah introduced us to Henrietta Darwin, Charles's daughter who was influentia

  • Season 3 Episode 11: a loathsome, distended, tumefied, bloated, dropsical mass

    21/05/2021

     By Photographer unidentified - MS Am 1092 (1185), Houghton Library, Harvard University, Public Domain, https://commons.wikimedia.org/w/index.php?curid=34246605In this final episode of Season 3 we actually do not talk about Darwin, but instead focus our attention to William James, a medical doctor, early psychologist, and philosopher who wrote about emotions about 20 years after Charles Darwin published The Expression of the Emotions in Man and Animals. Mark suggested we read James' views on emotion which he published first in his 1890 two volume set of his Principles of Psychology and then distilled in his single volume Psychology:Briefer Course. You can find reading editions of both books at the wonderful resource Project Gutenberg.The opening and closing theme to Discovering Darwin is "May" by Jared C. Balogh.Interlude music Laid by James

  • Season 3 Episode 10: Shame, Blushing, and Guilt

    04/04/2021

     modified image from Bridgeman Art LibraryMark, Sarah, and James discuss the last technical chapter of Charles Darwin's The Expression of Emotions in Man and Animals, Chapter XIII:  Self Attention, Shame, Shyness, Modesty: Blushing. Mark Jackson's graduate research was on shame and guilt and he explained to us the difference between shame, guilt, embarrassment, and humiliation (a concept Darwin did not address) and why they are actually distinctly different emotions. In our discussion Mark explains why parents and teachers should not shame their children/students, but employ guilt, the gift that keeps on giving, if a change in behavior is what you seek.Darwin recognized blushing as a very distinct human behavior. In the chapter Darwin wrote:In most cases the face, ears and neck are the sole parts which redden; but many persons, whilst blushing intensely, feel that their whole bodies grow hot and tingle; and this shows that the entire surface must be in some manner affected. Blushes are said sometime

  • Season 3 Episode 9: Fear, Anxiety, and Terror

    11/03/2021

     We discuss Chapter XII of the text The Expression of the Emotions in Man and Animals. In this chapter Darwin explores the expressions we associate with surprise, fear, terror, horror, and anxiety. The stereotypical expression of fear, as represented by the image above from the 1950's horror film franchises,  has both a physiological function and a signal function. We discuss the various arguments Darwin made about the reason your eyes are opened wide, your mouth held agape, your hands held up. In this chapter Darwin used both photographs from Duchenne and woodcuts from photographs to illustrate the unique expressions humans employ when exhibiting that emotion. Fig. 20. Terror. From a photograph by Dr. Duchenne.We discussed how these expressions often illicit aid from others. In addition to people responding to the visual signal of fear, research has indicated that we also respond to the smell of fear. James discussed a study (Chen, Katdare, & Lucas 2006) where sweat samples generated

página 1 de 2