This book is a fiftieth anniversary republication of Thomas Nagel's "What Is It Like to Be a Bat?", a classic in the philosophy of mind. Through its argument for the irreducible subjectivity of consciousness, it played an essential role in making the study of consciousness a central part of philosophy, psychology, and neuroscience. It also spurred the now flourishing scientific attention to the consciousness of non-human creatures: mammals, birds, fish, mollusks, and insects. The book also includes a second essay offering (...) Nagel's more recent thoughts on the most promising positive response to the mind-body problem, as posed in the original essay. (shrink)

The central characteristic of cognitive explanations of behavior is the appeal to inner representations. I examine the grounds which justify representational explanations, seeking the minimum conditions which organisms must meet to be candidates for such explanations. I first discuss Fodor's proposal that representationality be attributed to systems which respond to nonnomic properties, arguing that the distinction between the nomic and nonnomic in perception is fatally ambiguous. Then I turn to an illustrative review of the behavior and neurobiology of Hermissenda crassicornis, (...) a marine mollusk. Concerning this "model system," I compare the representational style of explanation with both behaviorist and neurophysiological explanations. Representational explanation is potentially more comprehensive than its rivals, and thus I conclude that representations are useful posits wherever internal information-bearing states mediate behavior. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:A Far-Future Paleontology: The Baffling Case of Brunaspis enigmaticaAnne-Sophie Milon (bio) and Jan Zalasiewicz (bio)Paleontologists, for more than two centuries, have studied and debated the petrified remains of plants and animals that have evolved over the past three billion years on Earth. They have argued over the grand concepts that they reveal, such as biological evolution and climate change, and also the many specific questions thrown up by these (...) relics: was such-and-such a shell, a mollusk, or an arthropod? Did this fossil fish live high up in the water, among the plankton, or grub in the mud on the sea floor?These studies have for many paleontologists been a blessedly human-free zone, detached from the busy realities of our everyday lives. The science of paleontology, though, is simply one obscure part of a burgeoning and rapidly evolving technosphere that underpins our lives, and that is now evolving millions of new kinds of fossils—technofossils—far more rapidly than ever happened in biological evolution. Many of these objects will, quite certainly, become part of Earth’s future fossil record.If such an endeavor as paleontology were ever to arise again, in a distant post-human future, how would its practitioners deal with these bizarre relics?We provide a preview, on the following pages, of just one such enigma, and how it may be resolved (or not) by our puzzled disciplinary descendants. [End Page 31] Click for larger view View full resolution[End Page 32] Click for larger view View full resolution[End Page 33] Click for larger view View full resolution[End Page 34] Click for larger view View full resolution[End Page 35] Click for larger view View full resolution[End Page 36] Click for larger view View full resolution[End Page 37] Click for larger view View full resolution[End Page 38] Click for larger view View full resolution[End Page 39] Click for larger view View full resolution[End Page 40] Click for larger view View full resolution[End Page 41] Click for larger view View full resolution[End Page 42] Click for larger view View full resolution[End Page 43] Click for larger view View full resolution[End Page 44]Anne-Sophie Milon Anne-Sophie Milon is an artist-researcher who applies her illustration skills (HEAR, Strasbourg, France, 2010) and 2D traditional animation (UWE, Bristol, UK, 2012) to political arts (SPEAP, Sciences Po, 2015) and science and technology studies (HSTS, EHESS, 2022). For the past ten years, she has translated geological narratives–and ordinary ones for Earth sciences–into extraordinary plots for the uninitiated, including the humanities. She is currently working with Jan Zalasiewicz on a play, The Petrified Museum (2024), based on the British Geological Survey (Keyworth, UK), and on a PhD project in science and technology studies looking at limestones’ agencies in extractive industry practices (2025). She regularly collaborates with researchers from the Anthropocene Working Group: The Cosmic Oasis (Oxford University Press, 2022), “The Victims of Carbon Dioxide are Starting to Appear” in Feral Atlas (2021), and The Epochs of Nature (University of Chicago Press, 2016).Jan Zalasiewicz Jan Zalasiewicz is Emeritus Professor of Paleobiology at the University of Leicester. He was formerly a field geologist and paleontologist with the British Geological Survey, involved in the geological mapping of eastern England and central Wales. His interests include Early Paleozoic fossils, notably the graptolites (a kind of extinct zooplankton), mud and mudrocks, the Quaternary Ice Ages, the nature of geological time, and the geology made by humans. In recent years, he has helped develop the concept of an Anthropocene epoch. He enjoys writing popular science articles and books, and being involved in art/science projects.Copyright © 2023 Johns Hopkins University Press and SubStance, Inc... (shrink)

The multiple realizability thesis (MRT) is an important philosophical and psychological concept. It says any mental state can be constructed by multiple realizability (MR), meaning in many distinct ways from different physical parts. The goal of our study is to find if the MRT applies to the mental state of consciousness among animals. Many things have been written about MRT but the ones most applicable to animal consciousness are by Shapiro in a 2004 book called The Mind Incarnate and by (...) Polger and Shapiro in their 2016 work, The Multiple Realization Book. Standard, classical MRT has been around since 1967 and it says that a mental state can havevery manydifferent physical realizations, in a nearly unlimited manner. To the contrary, Shapiro’s book reasoned that physical, physiological, and historical constraints force mental traits to evolve in just a few, limited directions, which is seen as convergent evolution of the associated neural traits in different animal lineages. This is his mental constraint thesis (MCT). We examined the evolution of consciousness in animals and found that it arose independently in just three animal clades—vertebrates, arthropods, and cephalopod mollusks—all of which share many consciousness-associated traits: elaborate sensory organs and brains, high capacity for memory, directed mobility, etc. These three constrained, convergently evolved routes to consciousness fit Shapiro’s original MCT. More recently, Polger and Shapiro’s book presented much the same thesis but changed its name from MCT to a “modest identity thesis.” Furthermore, they argued against almost all the classically offered instances of MR in animal evolution, especially against the evidence of neural plasticity and the differently expanded cerebrums of mammals and birds. In contrast, we argue that some of these classical examples of MR are indeed valid and that Shapiro’s original MCT correction of MRT is the better account of the evolution of consciousness in animal clades. And we still agree that constraints and convergence refute the standard, nearly unconstrained, MRT. (shrink)

The coastal zone of Bangladesh is endowed with dynamic ‘Terrestrial’ and ‘Coastal and Marine ecosystem’. The zone confronts with declined environmental quality owing to unethical anthropogenic interventions. Few studies regarding ethical attitudes of local communities to conserve the coast were conducted earlier. Two objectives, such as (i) heavy metal concentration, and (ii) physio-chemical quality of sample soil and water were selected to reveal the environmental state of study area. Five heavy metals like- Cadmium, Copper, Iron, Lead, and Zinc; and four (...) physio-chemical parameters such as, the pH, Electrical Conductivity, Temperature, and Turbidity of sample soil and water were measured. The average concentration of Pb in soil is 10 times higher than world average (0.03 mg/g), while Cd concentration in soil is two times more than world average (0.11 mg/L). The concentration of Fe at Inani beach water is 1.54 mg/g more than world average (3.4 mg/g). The physio-chemical parameters are within standard range. Unethical discharge of toxic effluents from shrimp hatcheries, and municipal garbage are main sources of pollution, which ensue into environmental degradations. Concentration of five heavy metals and Calcium Carbonate (CaCO3) in sample mollusk shells exhibit biodiversity deterioration. The mollusk shells from Inani beach contains 0.04 mg/L Cd,0.08 mg/L Cu, 0.42 mg/L Fe, 0.38 mg/L Pb, and 0.07 mg/L Zn. The CaCO3 content in mollusk shells at Inani beach is 49.5%, which indicates the degradation of the mollusks, as shells normally are made with 95% - 97% Calcium Carbonate. Hence, the Department of Environment (DOE), Bangladesh (GoB) declared the area as an ‘Ecologically Critical Area’ (ECA). The concerned stakeholders, like- CPP volunteers and officials, Forest Division, Fisheries Research Institute, Bangladesh Water Development Board, Union Chairman and Journalists of Cox’s Bazar recommended insertion of moral values among local stakeholders through trainings, motivational lectures, demonstrations and dramas, as well as, incorporation of lessons about consequences of unethical activities upon geo-environment into text books. Though least practice has been found regarding moral values during survey, the present research advocates in developing ‘Knowledge pool’ about coastal environment, creating awareness, and developing moral ethics among the local, regional and national stakeholders. (shrink)

A critique of the view of "cognitive liberalism," as articulated in recent papers by Dan Lloyd , is presented. The main arguments are directed at Lloyd's claim that representational capacities may be found in organisms as simple as marine mollusks and at his formal analysis of cognitive representation as a type of information-bearing conditional dependency. An alternative interpretation-based view of cognitive representation is then briefly sketched.

No other natural kind receives as much abuse in the Aristotelian corpus as the octopus, and an instructive itinerary through that corpus can be constructed by following the manifestations of such abuse. Specifically, the octopus is judged “stupid” and endowed with poor, rudimentary structure; together with fellow cephalopoda and mollusks, it is even regarded as behaving “contrary to nature.” The moral that emerges from following this path is that Aristotle may be expressing here a deep conflict between two different models (...) equally present in his work, though they are assigned very different emphasis. Also, importantly, mollusks are said to be “mutilated,” which aligns the treatment they receive with the one Aristotle famously reserves for women. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Metazoa: Animal Life and the Birth of the Mind by Peter Godfrey-SmithMichael BrownMetazoa: Animal Life and the Birth of the Mind BY PETER GODFREY-SMITH New York: Farrar, Straus and Giroux, 2020Carrying forward the project he began in Other Minds (2016), Peter Godfrey-Smith aims in Metazoa (2020) to cast light on the problem of consciousness by inviting meditation on the minds of our distant deep-sea cousins. To elaborate on (...) the Nagelian question of what it’s like to be a bat, he asks what it is like to be a crab, a shrimp, or a cephalopod. One will not find here the dense and fine-grain argumentation that is characteristic of academic monographs, but instead a freer exploration of ideas ranging from marine biology, to philosophy of mind, to animal psychology. Godfrey-Smith’s more modest goal is not to argue definitively for a single viewpoint, but to acclimate the reader to the challenging conceptual-shift he calls gradualism—namely, “the idea that in evolution, minds and experience come slowly into view, rather than appearing in a single move” (262).In the place of a barrage of observational data or dense philosophical argumentation, Godfrey-Smith paints a rich picture of the underwater environment, describes his personal interactions with the creatures that live there, and invites the reader to reflect on their activities and the cognition behind them. In this capacity, he walks a fine line—not anthropomorphizing the creatures, but presenting their actions as mentally agnostic as possible—to let the reader consider how much mental unity there might be, or how much self-or other-awareness may or may [End Page 130] not be present behind the beady mollusk eyes. Nevertheless, he strives to acquaint us with creatures we otherwise might not engage with. The several drawings of the animals and settings Godfrey-Smith discusses throughout the book aid this goal, as well as eight pages of vibrant photographs featuring several of the book’s “characters.”Because minds are things formed over time, Godfrey-Smith takes us through the first fossil evidence of animals in the Ediacaran, the appearance of shrimp-like ancestors in the Cambrian, the vast increase in size of the Ordovician, and the appearance of the octopus and dinosaurs of the Mesozoic. Yet, minds also develop under pressure and conditions of their environment, so Godfrey-Smith takes us on his dives to consider what environmental conditions led to the development of these submarine minds. As such, the text inventively winds its way across dimensions of space, time, and a variety of academic disciplines.In advancing the gradualist thesis, Godfrey-Smith entertains the Aristotelian notion of continuity between life and mind, as opposed to Descartes’ firm dualism. In this way, as noted in chapter 2, when a cell establishes its boundaries and controls the traffic of ions in and out, it becomes a kind of self. This leads him to a discussion of the glass sponge, multicellular but structurally simple, and yet a “collector and curator of biological light,” referring to its ability to channel light like a fiber optic cable (47). Chapter 3 considers the cnidarians—corals, in particular—in which the first signs of animal action appear. This action, like grasping, requires the appearance of a nervous system, and this increased complexity seems to give rise to agency, and more particularly, subjecthood. Chapter 4 invites us to consider the crab to guide reflections on early animal sensation. Of particular interest to this investigation are signs of feeling pain, such as the release of painkillers and the tending of wounds. Surprisingly, scientists find such behavior in shrimp. Chapter 5 returns to more philosophical considerations, attempting to stitch up false dichotomies of self-awareness and other-awareness, and activity and passivity, to name a couple. This sets the stage for chapter 6’s examination of the mysterious mix of mental unity and disunity in the octopus. With a decentralized nervous system, each arm seems to have a mind of its own, yet the creature nevertheless acts to unified purposes. Godfrey-Smith considers the resemblance to split-brain cases in humans, and the copresence of unified and disunified experience in... (shrink)

In The Oyster, multiple disciplines (philosophy, literature, visual art, biology, architecture) converge within the experiences of thinking, eating, and diagramming. The center stage is given to a humble mollusk, which becomes an object, a subject, a sentient consciousness, and an alien will, progressively and then even simultaneously.

Ragnar Rommetveit University of Oslo Let me start this introduction to Professor O'Connell's Critical essays on language use and psychology with some reflections on psychologists and crabs. It so happens that the first professor of psychology in Norway had the middle name Krabbe ("Crab") His full name was Harald Krabbe Schjelderup. Hence, the crab became our symbol for the psychologist. For many years a "crab feast" was held every autumn in Oslo in order to celebrate the material union of crabs (...) and psychologists and ponder (symbolically and metaphorically) their shared fate. A comparison between the predicament of the crab and that of the modern psychologist may indeed be illuminating, once we make certain assumptions about their unique epistemic missions and systematically explore the severe constraints on their heroic search for knowledge. The crab is ordained to unravel the mysteries of the ocean, yet doomed to crawl sidewise on the is most of the time mollusks and bottom. His catch, alas, cadavers of sea creatures, and he cannot help envying the fish swimming freely above him. The psychologist's mission is to unravel the mysteries of His obligation to seek insight into essential the human soul. (shrink)

Godfrey-Smith begins with the particular, with the peculiarities of some creatures in a small corner of the animal kingdom, and builds up his reasoning and evidence through a series of detailed comparisons with other creatures. He often finds that similar effects have different causes, and appears to rely on the inverse of the Newtonian principle, namely, that similar causes will have similar effects. But the similarities and differences that occupy Godfrey-Smith are not only or mainly by comparison with humans or (...) mammals. His story is as much about how octopuses and cuttlefish differ from other mollusks and from their common ancestors as about how they behave in ways commonly associated with vertebrates. (shrink)

This chapter contains sections titled: The Domains of Microevolution and Macroevolution Changing Meanings of Macroevolution An Expanding Hierarchy of Selection Origins of Novelty Mass Extinctions Is Evolution Uniformitarian? Conclusions Postscript: Counterpoint References.

We use genomic information to tell us stories of evolutionary origins. But what does it mean when different genomes report wildly different accounts of lineage history? This genomic “discordance” can be a consequence of a fascinating suite of natural history and evolutionary phenomena, from the different inheritance mechanisms of nuclear versus cytoplasmic (mitochondrial and plastid) genomes to hybridization and introgression to horizontal transfer. Here, we explore how we can use these distinct genomic stories to provide new insights into the maintenance (...) of sexual reproduction, one of the most important unanswered questions in biology. We focus on the strikingly distinct nuclear versus mitochondrial versions of the story surrounding the origin and maintenance of asexual lineages in Potamopyrgus antipodarum, a New Zealand freshwater snail. While key questions remain unresolved, these data inspire multiple testable hypotheses that can be powerfully applied across a broad range of taxa toward a deeper understanding of the causes and consequences of mitonuclear discordance, the maintenance of sex, and the origin of new asexual lineages. (shrink)