Terraforming Mars is widely discussed but rarely studied rigorously. This Perspective advocates for more research on the topic, ranging from warming methods to biological engineering, to clarify feasibility, costs, ethics and planetary impacts before any ambitious, large-scale attempts.
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What happens when intelligence escapes the bounds of flesh and bone? In this episode, we explore post-biological civilizations—entities that may trade biology for digital minds, machine bodies, or stranger forms still—and ask what becomes of identity, purpose, and humanity when the body is no longer required.
Watch my exclusive video Antimatter Propulsion: Harnessing the Power of Annihilation — https://nebula.tv/videos/isaacarthur–… Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isa… Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30. SFIA Discord Server: / discord Credits: Post-Biological Civilizations: Life Beyond Flesh and Bone Episode 498a; May 11, 2025 Written, Produced & Narrated by: Isaac Arthur Edited by: Ludwig Luska Select imagery/video supplied by Getty Images Music Courtesy of Epidemic Sound http://epidemicsound.com/creator Chris Zabriskie, “Unfoldment, Revealment” Phase Shift, “Forest Night” Lewis Gill, “The Phobos Diary” Stellardrone, “Red Giant” 0:00 Intro 1:24 The Physical Presence of Post-Biological Civilizations 3:38 Societal & Cultural Aspects of Post-Biological Life 5:08 The Scifi Path to Post-Biological Life 8:03 The Singularity and the Ultimate Transition 9:47 Many Paths to Post-Biological Life 17:50 The Fermi Paradox & Post-Biological Civilizations 27:39 Ethics & the Fate of Humanity 29:17 The Transition Process at a Civilizational Scale. Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur. Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isa… Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30.
SFIA Discord Server: / discord. Credits: Post-Biological Civilizations: Life Beyond Flesh and Bone. Episode 498a; May 11, 2025 Written, Produced & Narrated by: Isaac Arthur. Edited by: Ludwig Luska. Select imagery/video supplied by Getty Images. Music Courtesy of Epidemic Sound http://epidemicsound.com/creator. Chris Zabriskie, \
New research shows that people’s sensitivity to their internal bodily signals influences how closely they align with group moral preferences in dilemmas.
Michael Levin is a Distinguished Professor in the Biology Department at Tufts University, where he holds the Vannevar Bush endowed Chair, and he is also associate faculty at the Wyss Institute at Harvard University. Michael and the Levin Lab work at the intersection of biology, artificial life, bioengineering, synthetic morphology, and cognitive science. Michael also appeared on the show in episode #151, which was all about synthetic life and collective intelligence. In this episode, Michael and Robinson discuss the nature of cognition, working with Daniel Dennett, how cognition can be realized by different structures and materials, how to define robots, a new class of robot called the Anthrobot, and whether or not we have moral obligations to biological robots.
OUTLINE 00:00 Introduction. 02:14 What is Cognition? 08:01 On Working with Daniel Dennett. 13:17 Gatekeeping in Cognitive Science. 25:15 The Multi-Realizability of Cognition. 31:30 What are Anthrobots? 39:33 What Are Robots, Really? 59:53 Do We Have Moral Obligations to Biological Robots?
Robinson Erhardt researches symbolic logic and the foundations of mathematics at Stanford University. Join him in conversations with philosophers, scientists, weightlifters, artists, and everyone in-between.
Human cyborgs are individuals who integrate advanced technology into their bodies, enhancing their physical or cognitive abilities. This fusion of man and machine blurs the line between science fiction and reality, raising questions about the future of humanity, ethics, and the limits of human potential. From bionic limbs to brain-computer interfaces, cyborg technology is rapidly evolving, pushing us closer to a world where humans and machines become one.
“Disembodied Brains: Understanding our Intuitions on Human-Animal Neuro-Chimeras and Human Brain Organoids” by John H. Evans Book Link: https://amzn.to/40SSifF “Introduction to Organoid Intelligence: Lecture Notes on Computer Science” by Daniel Szelogowski Book Link: https://amzn.to/3Eqzf4C “The Emerging Field of Human Neural Organoids, Transplants, and Chimeras: Science, Ethics, and Governance” by The National Academy of Sciences, Engineering and Medicine Book Link: https://amzn.to/4hLR1Oe (Affiliate links: If you use these links to buy something, I may earn a commission at no extra cost to you.) Playlist: • Two AI’s Discuss: The Quantum Physics… The hosts explore the ethical and scientific implications of brain organoids and synthetic biological intelligence (SBI). Several sources discuss the potential for consciousness and sentience in these systems, prompting debate on their moral status and the need for ethical guidelines in research. A key focus is determining at what point, if any, brain organoids or SBI merit moral consideration similar to that afforded to humans or animals, influencing research limitations and regulations. The texts also examine the use of brain organoids as a replacement for animal testing in research, highlighting the potential benefits and challenges of this approach. Finally, the development of “Organoid Intelligence” (OI), combining organoids with AI, is presented as a promising but ethically complex frontier in biocomputing. Our sources discuss several types of brain organoids, which are 3D tissue cultures derived from human pluripotent stem cells (hPSCs) that self-organize to model features of the developing human brain. Here’s a brief overview: • Cerebral Organoids: This term is often used interchangeably with “brain organoids”. They are designed to model the human neocortex and can exhibit complex brain activity. These organoids can replicate the development of the brain in-vitro up to the mid-fetal period. • Cortical Organoids: These are a type of brain organoid specifically intended to model the human neocortex. They are formed of a single type of tissue and represent one important brain region. They have been shown to develop nerve tracts with functional output. • Whole-brain Organoids: These organoids are not developed with a specific focus, like the forebrain or cerebellum. They show electrical activity very similar to that of preterm infant brains. • Region-specific Organoids: These are designed to model specific regions of the brain such as the forebrain, midbrain, or hypothalamus. For example, midbrain-specific organoids can contain functional dopaminergic and neuromelanin-producing neurons. • Optic Vesicle-containing Brain Organoids (OVB-organoids): These organoids develop bilateral optic vesicles, which are light sensitive, and contain cellular components of a developing optic vesicle, including primitive corneal epithelial and lens-like cells, retinal pigment epithelia, retinal progenitor cells, axon-like projections, and electrically active neuronal networks. • Brain Assembloids: These are created when organoids from different parts of the brain are placed next to each other, forming links. • Brainspheres/Cortical Spheroids: These are simpler models that primarily resemble the developing in-vivo human prenatal brain, and are particularly useful for studying the cortex. Unlike brain organoids, they do not typically represent multiple brain regions. • Mini-brains: This term has been debunked in favor of the more accurate “brain organoid”. These various types of brain organoids offer diverse models for studying brain development, function, and disease. Researchers are also working to improve these models by incorporating features like vascularization and sensory input. #BrainOrganoids #organoid #Bioethics #OrganoidIntelligence #WetwareComputing #Sentience #ArtificialConsciousness #Neuroethics #AI #Biocomputing #NeuralNetworks #ConsciousnessResearch #PrecautionaryPrinciple #AnimalTestingAlternatives #ResearchEthics #EmergingTechnology #skeptic #podcast #synopsis #books #bookreview #ai #artificialintelligence #booktube #aigenerated #documentary #alternativeviews #aideepdive #science #hiddenhistory #futurism #videoessay #ethics
Parul Sehgal of The New York Times stated “In these pieces, plucked from the last 20 years, Holt takes on infinity and the infinitesimal, the illusion of time, the birth of eugenics, the so-called new atheism, smartphones and distraction. It is an elegant history of recent ideas. There are a few historical correctives — he dismantles the notion that Ada Lovelace, the daughter of Lord Byron, was the first computer programmer. But he generally prefers to perch in the middle of a muddle — say, the string theory wars — and hear evidence from both sides without rushing to adjudication. The essays orbit around three chief concerns: How do we conceive of the world (metaphysics), how do we know what we know (epistemology) and how do we conduct ourselves (ethics)”. [ 6 ]
Steven Poole of The Wall Street Journal commented “…this collection of previously published essays by Jim Holt, who is one of the very best modern science writers”. [ 7 ]
New research shows that moral conviction speeds up political decision-making and activates emotional and cognitive brain regions—especially in people with lower self-awareness about their own judgment accuracy.