New research that indicates humans may have arrived in Europe much earlier than previously thought also raises some intriguing questions.

A two-million-year-old fossil vertebrae shows Australopithecus sediba used their upper limbs to climb like apes and their lower limbs to walk like humans.

The footprints offer hints of people's real lives 23,000 years ago. "What we see here is also activity of play, and of different ages coming together."

The beads are some of the earliest evidence of people expressing identity with clothing. "They're the tip of the iceberg for that kind of human trait."

Exceedingly hard or tough foods might have given Homo floresiensis (nicknamed the Hobbit) a sore jaw. But stone tools may have made chewing easier.

Dragon Man's 140,000-year-old fossilized skull may reveal new clues about the transition between our earlier ancestors and modern humans.

Radiocarbon dating of rabbit and deer bones found in a Mexican cave in the 1960s suggest the first humans arrived in North America about 30,000 years ago.

The evidence "shows early people, over a long period of time, took control over their environment rather than being controlled by it."

The shells of ostrich eggs, left in ancient trash heaps called middens, outperform other methods of dating for studying early Homo sapiens.