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Ancient amputations tell remarkable stories of survival and care

A 33,000-year-old case of an amputated leg prompts comparisons to earlier Neandertal instances of amputation.

Skull of the Shanidar 1 individual with portions of the upper body skeleton visible, on a blue velvet table
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HIV susceptibility locus protects against an extinct virus

The TRIM5α protein in humans doesn't resist HIV very well but may have once protected us from another ape virus.