genetic-mutation-shielded-the-brains-of-homo-sapiens-from-lead-contamination-in-caves-allowing-the-flourishing-of-language-and-intelligence

[ruprmurdoch]

A Genetic Mutation Shielded the Brains of Homo sapiens from Lead Contamination in Caves, Allowing the Flourishing of Language and Intelligence

Environmental exposure to lead, a phenomenon once believed to be relatively recent in human history, actually dates back more than two million years and affected both modern humans and their extinct relatives, such as the Neanderthals. However, a tiny genetic variation — a single letter in the DNA c

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