- A 40,000-year-old newborn's hip bone was found in a French cave.
- The bone could mean modern humans shared the cave with Neanderthals.
- The finding hints humans and Neanderthals may have a mysterious common culture.
A tiny 40,000-year-old human hip bone found in a French cave could overhaul what we know about how humans interacted with Neanderthals.
The early human bone was found in a cave at the center of a debate about Neanderthal culture.