Last Glacial Maximum

c. 26,000 BCENotable

Ice sheets reach their greatest extent. Sea levels drop and land bridges connect Siberia and Alaska.

Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → Plate tectonics begins → Isthmus of Panama closes → Ice Age cycles begin → Last Glacial Maximum

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BookSteven Mithen

After the Ice: A Global Human History, 20,000-5000 BC ↗