Our understanding of human ancestry has changed dramatically since the discovery of Lucy the ancient hominin 50 years ago.

The 3.2-million-year-old fossil, discovered 50 years ago, is considered to be one of the most significant early hominin ...

Her cranium was about the size of a chimp’s, reversing a long-held belief that big brains preceded balance. Brown eventually helped cast replicas of Lucy’s fossils, then kept CMNH’s promise to ...