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geology

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The so-called Toba bottleneck simply didn't happen

Prompted by a paper by Chad Yost and coworkers, I look at the persistent myth that humans were an endangered species only 74,000 years ago.

A volcanic eruption with ash cloud rising from caldera
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Describing the Great Rift Valley

I share some geological and geographical knowledge from the Omo River valley, one part of the African Rift system.

John Hawks in front of a wooded river with badlands in the distance