Peer into Alan Alda's head as we uncover where our most human abilities reside. Watch the full episode now.

Alan Alda finds out how human social networks compare to those of chimps and watches babies pick cooperative puppets over those that won't play.

Alan Alda explores how much humans and chimps have in common, and what sets us apart. Watch the full episode now.

Was the area that is now the coast of South Africa once an important site of innovation for early humans?

Take a look at the excavations at Scladina, a deep cave only recently discovered outside Liege, Belgium, where Neanderthals lived 100,000 years ago.

Alan Alda confronts the puzzle of why our ancestors got the Spark and evolved into us, while the first humans to leave Africa for Europe--the Neanderthals--never did.

In this video, archaeologist Michel Toussaint describes how the first discovery of a Neanderthal skull in 1829 was ahead of its time.

Scroll through this interactive feature to learn a bit about some of the evidence Alan examined as well as some of the current debates in the field.

When an ancient collapsed roof was found at the archaeological site Abri Castanet, Randall White was happy to try to pick up the pieces.

Veronica Waweru describes some of her game-changing research on ancient hunting and what it was like to work with our television crew.