Scientists uncover a 75,000-year-old Arctic ecosystem in Norway, revealing extinct mitochondrial lineages in polar bears, ...

Toddlers can name a few animals. Older kids group animals into categories (birds, fish). And teenagers can sketch a rough ...

A new study finds early humans ate tough grasses and tubers long before their teeth adapted, suggesting behavior, not biology, drove human evolution.

Toddlers can name a few animals. Older kids group animals into categories (birds, fish). And teenagers can sketch a rough tree of life. But when 16 ...