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The Younger Dryas Reset: What Nearly Ended Humanity? | History For Sleep

Twelve thousand eight hundred years ago, Earth was warming. Ice sheets were melting. Humans were settling down, building permanent homes. Then temperatures crashed—ten to fifteen degrees in less than a decade, maybe just three years. Winter came and didn't leave for 1,200 years. This was the Younger Dryas. Ice cores from Greenland show the temperature dropped like falling off a cliff. Settlements were abandoned. Populations crashed. In some regions, humans nearly disappeared. But what caused it? An asteroid exploding over North America? Massive ice sheet collapse changing ocean currents? No one knows for sure. The evidence shows something burned—huge fires across continents, melted rock spherules, platinum spikes in the ice. The Clovis culture vanished. Megafauna went extinct. We almost didn't make it. This episode explores the mystery of what nearly ended humanity, the theories scientists can't agree on, and how surviving the freeze forced us to invent farming, villages, and civilization itself.

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TIMESTAMPS & TOPICS:
0:00 Introduction: When Winter Stayed for 1,200 Years
14:00 The Evidence: Ice Cores Show Temperature Cliff Dive
27:00 Impact Hypothesis: Did a Comet Explode Over North America?
41:00 The Clovis Disappearance: A Culture Wiped Out
54:00 Megafauna Extinction: When Giants Died
1:08:00 Alternative Theory: Ice Sheet Collapse and Ocean Currents
1:21:00 What It Was Like: Surviving the Freeze
1:35:00 The Reset: How Disaster Forced Agriculture
1:48:00 Göbekli Tepe and the Birth of Civilization
2:01:00 Conclusion: The Survivors Who Rebuilt Everything

DIVE DEEPER:
The Cycle of Cosmic Catastrophes by Firestone, West & Warwick-Smith (2006) — The impact hypothesis explained
After the Ice by Steven Mithen (2003) — Life during and after the Younger Dryas
The Long Summer by Brian Fagan (2004) — How the warm period shaped civilization

Context: Please remember that our primary goal is to help you unwind. While rooted in historical research, our content is artistic storytelling, not academic study. Thank you for letting us tell you a story tonight.

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