Free Radicals

Daniel Shur and Eric Dai
Free Radicals
Latest episode

16 episodes

  • Free Radicals

    Longevity science & philosophy with the blogger leading theory at Sam Altman’s $1B+ startup - Jose, Author Nintil & Head of Theory at Retro

    03/17/2026 | 2h 4 mins.
    Jose Luis Ricón Fernández de la Puente is the author of the popular blog Nintil, and Head of Theory at Retro Biosciences. Jose is a prolific blogger, covering a wide breadth of topics across economics, philosophy, progress studies, science funding, and of course longevity. His writing has been published in a16z Future, Works in Progress and by the Adam Smith Institute, and his writing previously won him a fellowship with Emergent Ventures, Tyler Cowen’s competitive program for intellectually ambitious projects.
    In this interview, you’ll hear how insightful Jose is about deeply technical topics in biology, and you’ll see why Retro Bio was eager to bring him on as their head of theory (the only role of its kind in the entire biotech industry).
    Our conversation is wide ranging, spanning a deep dive on Retro’s work to replace and engineer microglia to rejuvenate the brain and how our cells have the ability to turn back the aging clock but choose not to. We also covered the technological stagnation and why biological engineering is the new frontier of progress, as well as philosophical topics like transhumanism and how a future of total biological control might impact our values and way of life.
    Retro Biosciences was seeded with $180M by OpenAI CEO Sam Altman to develop therapies to prevent and reverse age-related disease, and is widely recognized as one of the leading AI for longevity companies. Previously, we hosted Rico Meinl, the head of Applied AI at Retro, so make sure to give that episode a listen as well.
  • Free Radicals

    Inside the AI used by Sam Altman’s $1B+ longevity startup - Rico Meinl, Head of Applied AI at Retro Bio

    03/10/2026 | 1h 16 mins.
    Retro Biosciences was seeded with $180M by OpenAI CEO Sam Altman to develop therapies to prevent and reverse age-related disease, and is widely recognized as one of the leading AI for longevity companies.  Today’s guest is Rico Meinl, the Head of Applied AI at Retro Biosciences.
    In this episode, we discuss Retro’s work with OpenAI to engineer 50x more effective Yamanaka factors, what it means to build foundation models that can reason across natural language and protein sequence, and why the bottlenecks in biology are more experimental than computational. We also get into the biology of aging and how AI can enable therapies that dramatically advance healthy lifespan.
  • Free Radicals

    Why DNA Damage is Central to Aging — Christopher Bradley, CEO of Matter Bio

    03/03/2026 | 1h 21 mins.
    Christopher is a serial entrepreneur who has dedicated himself to solving aging after his last startup Mana Health was acquired by NBC Universal. His company Matter Bio is developing therapies to enhance DNA damage repair to slow the rate of aging, and to treat cancer through novel bacterial delivery mechanisms.
    In today’s conversation we discuss the theory of aging as information loss, which Chris contends is primarily mediated through DNA damage, how to unlock new approaches for longevity through large scale genomics studies, and the evolving business of biotech.
  • Free Radicals

    Why DNA Damage is Central to Aging — Christopher Bradley, CEO of Matter Bio

    03/03/2026 | 1h 21 mins.
    Christopher is a serial entrepreneur who has dedicated himself to solving aging after his last startup Mana Health was acquired by NBC Universal. His company Matter Bio is developing therapies to enhance DNA damage repair to slow the rate of aging, and to treat cancer through novel bacterial delivery mechanisms.
    In today’s conversation we discuss the theory of aging as information loss, which Chris contends is primarily mediated through DNA damage, how to unlock new approaches for longevity through large scale genomics studies, and the evolving business of biotech.
  • Free Radicals

    The moral and economic case for delaying aging - Raiany Romanni-Klein

    02/24/2026 | 1h 9 mins.
    Raiany Romanni-Klein is a Harvard and Brown-trained bioethicist focused on understanding why secular people like to narrate death and aging as good things, and quantifying the economic impacts of such narratives. She worked with legends like George Church and Steven Pinker on her PhD, and also played a central role in designing the $101 million dollar XPRIZE for Healthspan, the largest science prize ever awarded. 
    Raiany is also the founder of a new think tank designed to study and streamline progress in America’s science and technology, and most recently published a paper demonstrating that delaying overall biological aging by just one year could yield $27 trillion dollars in net present value.
    Today’s conversation is focused on the ethics and economics of longevity.

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About Free Radicals

Interviewing visionaries dedicated to giving humanity control over biology. All problems are solvable, including aging and death.
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