Siberia

Denisovans and Neanderthals likely overlapped at this Stone Age hot spot for thousands of years, and modern Homo sapiens may have dwelled there, too.  

The documentary weaves together a hunt for mammoth tusks in the Arctic with scenes from the front lines of synthetic biology.

A genetic analysis of Siberians finds three genes that have evolved to help the populations weather the frigid winters.

Researchers at Japanese and Russian institutions believe cloning a woolly mammoth is within reach.