In the 1960s, Kimura’s neutral theory revolutionized molecular biology by arguing most DNA changes are random, not adaptive. A new study finds beneficial mutations are far more common than Kimura’s ...

Scientists found that one tiny genetic change can completely alter how a coronavirus behaves in different species. Comparing ...

Fossils unearthed in Ethiopia are reshaping our view of human evolution. Instead of a straight march from ape-like ancestors to modern humans, researchers now see a tangled, branching tree with ...

The idea of a rapid human transformation, which supposedly turned our ancestors into modern beings around 50,000 years ago, ...