The human brain is a greedy organ. It gulps energy, demands constant upkeep, and somehow grew far larger (relative to body size) than the brains of any other primate. Scientists have always wondered ...

The different species in the human gut microbiome change and evolve throughout a person's life and even across multiple generations. Studies show that gut bacteria often evolve rapidly, with new ...

A new study shows cultural evolution helped humans expand across Earth far faster than genetic change alone could achieve.

Researchers at the Francis Crick Institute and UCL have analyzed ancient DNA from Borrelia recurrentis, a type of bacteria that causes relapsing fever, pinpointing when it evolved to spread through ...

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 ...