10 Scariest Theories That Suggest Our Galaxy Is Full of Dead Civilizations

Hey guys! We’re now live on Spotify🎧 Listen here: https://open.spotify.com/show/1c2uppn... Iron-sixty from a nearby supernova is sitting in the floor of the Pacific Ocean, drilled out and counted atom by atom. Other theories on this list predict machines already inside this solar system, a message written into the genetic code, or a world that evolves intelligence and never lights a fire. So what does the last one predict? Ten theories about a silent galaxy, counted down from ten to one and ranked by how much physical evidence each one leaves behind for us to find. A full three-hour walk, made to be listened to at any pace, including drifting off. Settle in and let this slow descent through ten explanations for an empty sky keep you company tonight. Subscribe to The Cosmographer if you like the long way through the universe's greatest lists. CHAPTERS 0:00 Introduction 1:32 Number Ten — Debris We Have Already Held 20:09 Number Nine — The Beam That Leaves No Scar 38:32 Number Eight — Machines That Should Be Here 58:02 Number Seven — The Message Inside Us 1:15:31 Number Six — The Forest And The Silence 1:34:02 Number Five — The World That Never Burned 1:53:30 Number Four — The Window We Are Standing In 2:14:34 Number Three — A Direction Nobody Searches 2:32:42 Number Two — The Barrier Nobody Can Locate 2:52:42 Number One — What The Silence Actually Means SOURCES Robin Hanson — The Great Filter: Are We Almost Past It? — https://mason.gmu.edu/~rhanson/greatf... Melott et al. — Did a gamma-ray burst initiate the late Ordovician mass extinction? — https://arxiv.org/pdf/astro-ph/0309415 Thomas et al. — Gamma-Ray Bursts and the Earth: Atmospheric, Biological and Climatic Effects — https://arxiv.org/pdf/astro-ph/0505472 Wallner et al. — Recent near-Earth supernovae probed by global deposition of interstellar 60Fe (Nature) — https://www.nature.com/articles/natur... Crick & Orgel — Directed Panspermia (Icarus, 1973) — https://ui.adsabs.harvard.edu/abs/197... Smart — The Transcension Hypothesis (Acta Astronautica, 2012) — https://ui.adsabs.harvard.edu/abs/201... Mills et al. — A reassessment of the "hard-steps" model (Science Advances) — https://www.science.org/doi/10.1126/s... Mills et al. — A reassessment of the "hard-steps" model (preprint) — https://arxiv.org/pdf/2408.10293 Balbi & Frank — The oxygen bottleneck for technospheres (Nature Astronomy) — https://www.nature.com/articles/s4155... Suazo et al. — Project Hephaistos II: Dyson sphere candidates (MNRAS) — https://academic.oup.com/mnras/articl... Suazo et al. — Project Hephaistos II (preprint) — https://arxiv.org/abs/2405.02927 Garrett — Is artificial intelligence the great filter? (Acta Astronautica) — https://www.sciencedirect.com/science... Vinn — Incompatibility of inherited behavior patterns with civilization (Science Progress) — https://journals.sagepub.com/doi/10.1... Stevens, Forgan & O'Malley-James — Observational signatures of self-destructive civilizations — https://www.cambridge.org/core/journa... Loeb, Batista & Sloan — Is Earthly life premature from a cosmic perspective? — https://phys.org/news/2016-08-earthly... — Disclaimer: The Cosmographer produces educational entertainment. Factual claims come from published research and official scientific institutions, and any speculation or open question is labeled as such when it appears. This channel is not a news outlet. Watch at your own discretion. #DeadCivilizations #GreatFilter