Recent fossil finds could mean that "Lucy" wasn't our direct ancestor, some scientists say. Others strongly disagree.

Fifty years ago today, a groundbreaking discovery was unearthed in Ethiopia, the fossilized bones of a human ancestor, and you probably already know her name... (SOUNDBITE OF SONG, "LUCY IN THE SKY ...

Fifty years ago this weekend, there was a team of archaeologists digging in Ethiopia, looking for early fossils of human ancestors. After an uneventful morning, Donald Johanson walked back to his Land ...

She was, for a while, the oldest known member of the human family. Fifty years after the discovery of Lucy in Ethiopia, the remarkable remains continue to yield theories and questions. In a ...