Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

Humanity is merely one species out of millions living on Earth, but we have a disproportionate impact on the rest of the biosphere. Recent transformations have accelerated that impact, but in fact it stretches back to the earliest days in human history. In his new book The Last Animal: Human History and the Fate of Life on Earth from the Ice Age to the Sixth Extinction, historian Kyle Harper traces how humans have impacted the rest of the planet, from extinction events to much more subtle changes. Blog post with transcript: https://preposterousuniverse.com/podcast/2026/10/19/371-kyle-harper-on-how-humans-have-shaped-life-on-earth/ Listen or watch Rolex Planet Visionaries wherever you get your podcasts. #ad Got to https://scribe.how/mindscape and mention Mindscape for you first month of Scribe Capture free on select plans. #ad Stop piecing your software together. Go to https://odoo.com/mindscape to learn more. #ad Upgrade your everyday with Quince and get free shipping and 365-day returns at https://quince.com/MINDSCAPE. #ad Support Mindscape on Patreon. Kyle Harper received a Ph.D. in history from Harvard University. He is currently the G.T. and Libby Blankenship Chair in the History of Liberty, Professor of Classics and Letters, Senior Advisor to the President, and Provost Emeritus at the University of Oklahoma, and an external faculty member at the Santa Fe Institute. Among his honors are the Award for Excellence in Historical Studies from the American Academy of Religion and the PROSE winner for best book in the history of science, technology, and medicine. University of Oklahoma web page Google Scholar publications Amazon author page Wikipedia

Welcome to the October 2026 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number -- based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good -- and sometimes group them together if they are about a similar topic. Enjoy! Blog post with show notes, AMA questions, and transcript: https://preposterousuniverse.com/podcast/2026/10/12/ama-october-2026/ Listen or watch Rolex Planet Visionaries wherever you get your podcasts. #ad Upgrade to a TP-Link WiFi Mesh System -- use code MINDSCAPE10 at https://us.store.tp-link.com. #ad

One reason it's been so hard to directly detect the dark matter is that we're not sure what it is. But for a long time, a leading candidate has been "Weakly Interacting Massive Particles" (WIMPs), so an impressive amount of experimental effort has been put into trying to detect them. Recently, a single provocative event appeared in the LUX-ZEPLIN (LZ) dark matter experiment. Daniel Akerib, a physicist at LZ, joins us to talk about dark matter and the recent data, which has low statistical significance but is intriguing nevertheless. Blog post with show notes and transcript: https://preposterousuniverse.com/podcast/2026/10/05/370-daniel-akerib-on-a-faint-hint-of-dark-matter/ Support Mindscape on Patreon. Daniel Akerib received a Ph.D. in physics from Princeton University. He is currently Professor of Particle Physics and Astrophysics at the SLAC National Accelerator Laboratory and Professor of Physics, by courtesy, in the physics department at Stanford University. He has been searching for dark matter since the early 1990s, first with the Cryogenic Dark Matter Search and more recently with the LUX and LUX-ZEPLIN projects. SLAC web page Stanford web page Paper: "Search for dark matter particle interactions in an extended nuclear recoil energy window with the LUX-ZEPLIN (LZ) experiment" Wikipedia

The worry about debates over free will is that they degenerate into semantics -- what do you mean by "free will," really? But there are important substantive issues that shouldn't be ignored. Do people deserve blame for doing wrong things? Can we make choices that create meaning for our lives? Philosopher Gregg Caruso denies the reality of free will, but is in favor of making good choices, as he discusses in his new book How to Live Well Without Free Will. Listen or watch Rolex Planet Visionaries wherever you get your podcasts. #ad Blog post with transcript: https://preposterousuniverse.com/podcast/2026/09/28/369-gregg-caruso-on-living-well-without-free-will/ Support Mindscape on Patreon(opens in new tab). Gregg Caruso received a Ph.D. in Philosophy from the City University of New York. He is currently Professor of Applied Ethics and Management and Director of the Patrick J. Waide Center for Applied Ethics at Fairfield University, and Scientific Advisor, Center for Justice and Mental Well-Being, Nova Institute for Health. Among his awards are the Joseph B. Gittler Award from the American Philosophical Association. Web site Fairfield web page Google Scholar publications Amazon author page PhilPeople profile

In all sorts of ways, the modern world makes it difficult to nurture our individual humanity and connect with the humanity of others. The disciplines that try to do so are, naturally enough, the humanities. Poet Elizabeth Alexander's new book, Signals Across Vast Distances, grapples with the question of how literature and other humanistic studies can help us build empathy and become better people, and why that task is crucial to a flourishing democratic society. Blog post with transcript: https://preposterousuniverse.com/podcast/2026/09/21/368-elizabeth-alexander-on-why-democracy-needs-imagination/ Use code MINDSCAPE at https://monarch.com/ to get your first year of Monarch Core half off at just $50. #ad Upgrade your everyday with Quince and get free shipping and 365-day returns at https://quince.com/MINDSCAPE. #ad Listen or watch Rolex Planet Visionaries wherever you get your podcasts. #ad Support Mindscape on Patreon. Elizabeth Alexander received a Ph.D. in English from the University of Pennsylvania. In addition to her work as a poet and writer, she is currently the President of the Andrew W. Mellon Foundation. She composed and read a poem for Barack Obama's inauguration in 2009. Among her honors are a Guggenheim Fellowship, a National Magazine Award, and several Pushcart Prizes for poetry. Web site Poetry Foundation page Amazon author page Wikipedia