Placental hijacking: David Haig

Did you know that genes from your mom and genes from your dad battled it out inside you (and in your placenta) while you were in the womb? In this episode, Harvard evolutionary biologist, David Haig, explains where babies come from and how they hijack their parents to take care of them. From the intricate details of shark pregnancy to the parenting strategies of plants, David shares both curious sex facts and disturbing strategies of reproduction across the tree of life. And you'll learn more than you wanted to know about the most wonderful and creepy organ of all, the placenta.