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In 1908, on a sunny, clear, quiet morning in Siberia, witnesses recall seeing a blinding light streak across the sky, and then\u2026 the earth shook, a forest was flattened, fish were thrown from streams, and roofs were blown off houses. The \u201cTunguska event,\u201d as it came to be known, was one of the largest extraterrestrial impact events in Earth\u2019s history. But what kind of impact\u2014what exactly struck the earth in the middle of Siberia?\u2014is still up for debate. Producer Annie McEwen dives into one idea that suggests a culprit so mysterious, so powerful, so\u2026 tiny, you won\u2019t believe your ears. And stranger still, it may be in you right now. Or, according to Senior Correspondent Molly Webster, it could be You.EPISODE CREDITS Reported by - Annie McEwen and Molly WebsterProduced by - Annie McEwen and Becca Bresslerwith help from - Matt KieltyOriginal music and sound design contributed by - Jeremy Bloom, Annie McEwen, Matt KieltyMixing by - Jeremy Bloomwith dialogue mixing by - Arianne WackFact-checking by - Diane Kellyand edited by\xa0 - Alex Neason\nGUESTS Matt O\u2019Dowd (https://www.mattodowd.space/)Special Thanks:\xa0\nSpecial thanks to, Matthew E. Caplan, Brian Greene, Priyamvada Natarajan, Almog Yalinewich\nEPISODE CITATIONS\nVideos: Watch \u201cPBS Space Time,\u201d (https://zpr.io/GNhVAWDday49) the groovy show and side-gig of physicist and episode guest Matt O\u2019Dowd\nArticles: Read more\xa0(https://zpr.io/J4cKYG5uTgNf) about the Tunguska impact event! Check out the paper\xa0(https://zpr.io/vZxkKtGQczBL), which considers the shape of the crater a primordial black hole would make, should it hit earth: \u201cCrater Morphology of Primordial Black Hole Impacts\u201dCurious to learn more about black holes possibly being dark matter? You can in the paper (https://zpr.io/sPpuSwhGFkDJ), \u201cExploring the high-redshift PBH- \u039bCDM Universe: early black hole seeding, the first stars and cosmic radiation backgrounds\u201d\n\xa0\nBooks:\xa0\nGet your glow on \u2013 Senior Correspondent Molly Webster has a new kids book, a fictional tale about a lonely Little Black Hole (https://zpr.io/e8EKrM7YF32T)\nOur newsletter comes out every Wednesday. It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (https://radiolab.org/newsletter)!\nRadiolab is supported by listeners like you. Support Radiolab by becoming a member of The Lab (https://members.radiolab.org/) today.\nFollow our show on Instagram, Twitter and Facebook @radiolab, and share your thoughts with us by emailing radiolab@wnyc.org.\n\nLeadership support for Radiolab\u2019s science programming is provided by the Gordon and Betty Moore Foundation, Science Sandbox, a Simons Foundation Initiative, and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.