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.

What in the world are mirror neurons? And why might they be important for humans to possess?

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.

A new study looked at how macaque monkeys respond to other monkeys’ efforts at communication in the form of drumming or vocalizing.

We took a look inside Alan's brain using an MRI machine. Apparently he has quite a plump hippocampus.

A Web site called Test My Brain lets you participate in online experiments and get feedback about how you compare to other online participants.

One of the earliest things American children are taught is how to count items out loud. But how much do we understand about numbers before we learn this vocabulary?

One of Scott’s most important responsibilities is making sure that nothing that can react with a magnet gets anywhere near the MRI machine. Watch this interview.

Check out these behind-the-scenes photos from our day filming with Helen Neville and colleagues at the Brain Development Lab at the University of Oregon.