Margaret Crofoot used GPS technology in an unprecedented way. She and her team fitted almost all of the adult members of a baboon troop with high-resolution GPS collars capable of recording movement at a scale of 1 GPS point every second. This fine-grained data gave Crofoot and her team a new way of tackling a question that has been vexing primatologists for decades. How do baboons make collective movement decisions?
Carl Sagan explores the evolution of human intelligence from the big bang, fifteen billion years ago, through today in this never-before-released archival lecture.