Deep TimeCosmos & Earth

Snowball Earth

700 million years agoNotable

Earth freezes nearly pole to pole. Its thaw may have helped trigger the rise of animals.

Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Snowball Earth

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BookGabrielle Walker

Snowball Earth ↗