We took a look inside Alan's brain using an MRI machine. Apparently he has quite a plump hippocampus.
Dan Gilbert and Alan Alda discuss whether animals have the ability to "prospect," or plan ahead.
Producer Graham Chedd thought a chat en plein air would add some visual variation from the two-guys-sitting-on-a-couch-type shot that's always easy to get in a professor’s office.
Harvard's Dan Lieberman argues that we humans evolved to become the best long-distance runners on earth -- and we did it barefoot!
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