SciShow

The Evolution of Male Homosexuality (2012x69)

Air date: May 11, 2012

Hank goes from space to sex and then to motherhood, covering the SpaceX launch, a mission to the moons of Jupiter, intersexual workplace rivalries, the evolution of male homosexuality, the fossil evidence of squishy baby skulls, toddler body bias, and the price of breastfeeding.