mothers and infants

If you missed National Geographic's documentary in April about the Fongoli chimpanzees in Senegal, Chimps: Next of Kin, check out this remarkable video. It shows field researchers returning a stolen baby chimp to her mother and community.

It's a scenario you'll recognize. A Mom's firm "no," via shade of the head, to her toddler, who is getting into something he or she shouldn't.

Scientists studying great ape infant behavior witnessed 4 bonobos shaking their heads in ways that appeared to mean "no" on 13 different occasions. The observation raises the question: Is the "no" head shake hard-coded in humans?

BBC Earth  News has the video.