Right-Handedness and Evolving Jaws

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At least one Homo habilis was right-handed, about 1,800,000 years ago. It's the earliest evidence of handedness in humanity's history. So far.

Our jaws may have started out as armor plate, not gill arches. Paleontologists found a second Silurian placoderm species with surprisingly familiar jaws....

...Before talking about Homo habilis, and new evidence showing how jaws evolved, I'll do my usual explanation for why science doesn't upset me....

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