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What The If?

What The If?

Von: Philip Shane Matt Stanley Gabrielle Paniccia
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 Learn how to think like EINSTEIN! Every week we learn science running imaginative thought experiments. Our brilliant guests are some of the world’s greatest science fiction writers, scientists & science communicators. Leap into a journey to answer the most fascinating question in the universe: What The IF?All rights reserved Wissenschaft
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  • Black Holes

    Black Holes
    Feb 20 2026
    MIT physicist David Kaiser is one of those rare scientists who can make mind-bending physics feel like a great conversation over coffee — funny, generous, and genuinely thrilled by what we still don't know. And what he's working on is wild. What the if the universe is packed with invisible black holes smaller than an atom? Dave thinks the mysterious "missing stuff" that holds galaxies together might not be some exotic undiscovered particle — it could be tiny black holes that formed a split second after the Big Bang. If he's right, a handful of them could be cruising through our solar system right now, and we might be able to catch one in the act just by watching Mars wobble. We also dig into whether a rogue black hole might have flattened a Siberian forest in 1908, and rest assured, the residents of Brooklyn have nothing to worry about. Learn more about David Kaiser's primordial black hole research: MIT PBH Research Group: https://sites.mit.edu/mitpbh/ David Kaiser's essay in the London Review of Books — a great accessible overview with historical context: https://www.lrb.co.uk/the-paper/v46/n11/david-kaiser/black-hole-flyby The ultrahigh-energy neutrino paper (open access): https://journals.aps.org/prl/abstract/10.1103/vnm4-7wdc "Close Encounters of a Primordial Kind" — the Mars wobbles paper: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.063533 (also available open access on arXiv: https://arxiv.org/abs/2312.17217) Primordial black holes with QCD color charge (open access): https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.231402 Full list of press coverage: https://sites.mit.edu/mitpbh/news/ Selected press coverage: MIT News — Exotic black holes could be a byproduct of dark matter: https://news.mit.edu/2024/exotic-black-holes-could-be-dark-matter-byproduct-0606 MIT News — Mars wobble could be dark matter: https://news.mit.edu/2024/mars-wobble-could-be-dark-matter-mit-study-finds-0917 MIT News — Could a primordial black hole explain a mysteriously energetic neutrino?: https://news.mit.edu/2025/could-primordial-black-holes-last-burst-explain-mysteriously-energetic-neutrino-0918 CNN — Black holes and dark matter: https://www.cnn.com/2024/06/17/science/black-holes-dark-matter-scn/index.html LA Times — Tiny black holes zipping through the solar system: https://www.latimes.com/science/story/2024-09-17/tiny-black-holes-zipping-through-the-solar-system Scientific American — Dark matter black holes could fly through the solar system once a decade: https://www.scientificamerican.com/article/dark-matter-black-holes-could-fly-through-the-solar-system-once-a-decade/ Quanta Magazine — Monster neutrino could be a messenger of ancient black holes: https://www.quantamagazine.org/monster-neutrino-could-be-a-messenger-of-ancient-black-holes-20260123/ APS Physics — "The Solar System as a Black Hole Detector" (Mars wobbles): https://physics.aps.org/articles/v17/s98 APS Physics — "New Suspect for Neutrino Signals" (neutrino paper): https://physics.aps.org/articles/v18/s124 --- Check out our membership rewards! Visit us at Patreon.com/Whattheif Got an IF of your own? Want to have us consider your idea for a show topic? Send YOUR IF to us! Email us at feedback@whattheif.com and let us know what's in your imagination. No idea is too small, or too big! Keep On IFFin', Philip, Matt & Gaby
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    1 Std. und 1 Min.
  • The Day Gravity QUIT!

    The Day Gravity QUIT!
    Feb 13 2026
    A conspiracy theory went viral claiming that on August 12th, 2026, Earth will lose gravity for seven seconds. The internet did what the internet does, and millions of people started talking about it. So we decided to take the question seriously — what the if gravity actually clocked out for seven seconds? Let's just say you might want to start shopping for bungee cords now. And maybe a bouncy castle. This episode was inspired by an Instagram post from the now-mysteriously-vanished user Mr. Donya OF, where all great science begins. --- Find out more about Gaby's science fiction short story! Here are the links for the anthology. The physical copy can be ordered here : https://www.neonhemlock.com/books/luminescent-machinations-queer-tales-of-monumental-invention The ebook can be ordered here: https://www.neonhemlock.com/ebooks/luminescent-machinations-queer-tales-of-monumental-invention
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    41 Min.
  • GROUND HOG Day PHYSICS!

    GROUND HOG Day PHYSICS!
    Feb 5 2026
    What the if a groundhog could actually predict the weather? Turns out Punxsutawney Phil would need way more than a shadow — we're talking a full groundhog space program, weather satellites, underground supercomputers, and a solar shade the size of western Pennsylvania. Welcome to the groundhog deep state, where fuzzy bureaucrats run atmospheric circulation models and control whether the sun shines on command. And here's the kicker — the whole setup might actually teach you why the weather forecast on your phone is one of civilization's most underappreciated miracles. --- Check out our membership rewards! Visit us at Patreon.com/Whattheif Got an IF of your own? Want to have us consider your idea for a show topic? Send YOUR IF to us! Email us at feedback@whattheif.com and let us know what's in your imagination. No idea is too small, or too big! Keep On IFFin', Philip, Matt & Gaby
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    30 Min.
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