Full Episode

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.

Cognitive psychologist Elizabeth Spelke tests the representational thinking skills of children by asking them to relate a map to the real world.

Alan gets a highly detailed scan of his brain. This image is the starting point for a search within his brain – as well as the brains of others – for the essential components of the Human Spark.