Insane in the big brain, insane in the brain - with Dr. Jackson Njau

Joining us today is Dr. Jackson Njau, a paleoanthropologist working to understand how early humans evolved and why. Hear about his work in Olduvai Gorge, a key anthropology site in Tanzania, how our brains have grown over time (as hard as that may be to believe sometimes), and a favorite dish of his - Ndizi.