When a nuclear disaster empties a landscape of people, nature doesn’t politely wait for instructions. It moves in. After the ...

Millions thrive at high altitudes due to remarkable genetic adaptations. Tibetans, for instance, possess a gene variant allowing efficient oxygen use without dangerously thick blood. Andeans and ...

A new study from the NIH’s All of Us program is shaking up long-held assumptions by revealing that genetic ancestry rarely aligns with racial labels — and that the interplay between biology and ...

Modern humans descended from not one, but at least two ancestral populations that drifted apart and later reconnected, long before modern humans spread across the globe. Using advanced analysis based ...

The Indigenous peoples of the Bolivian highlands are survivors. For thousands of years they have lived at altitudes of more than two miles, where oxygen is about 35 percent lower than at sea level.