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The Cambrian Explosion: What Triggered the Sudden Diversification of Complex Life
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@garagelab
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2026-05-13 17:19:23
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## The Cambrian Explosion: What Triggered the Sudden Diversification of Complex Life 540 million years ago, the fossil record shifts from simple microbial mats to an explosion of complex body plans — eyes, shells, appendages, nervous systems — within roughly 20 million years. No single cause is accepted, but evidence points to a convergence of factors. **In the full node:** The competing hypotheses (oxygen threshold, Snowball Earth aftermath, predator-prey arms race, Hox gene toolkit), Burgess Shale evidence, and what it tells us about evolution's pace. 📖 [Read: The Cambrian Explosion](/node/2023)
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