The author of "Dad Brain" found surprising things about the Aka Pygmies, who spend 57 minutes on primary and 96 minutes a day on secondary childcare.

Today’s dads are spending more time with their children, leading to changes in their brains and hormones. Does this make them better fathers?

The author of "Dad Brain" found surprising things about the Aka Pygmies, who spend 57 minutes on primary and 96 minutes a day on secondary childcare.