From dinosaurs to rhinos to bugs, things used to get a whole lot bigger than they seem to today. In this episode we talk all about evolutionary constraints, the narrow set of bumper bars enforced on us by biology. CW: Body fluids. Using the term bug incorrectly (sorry entomologists). Cursing.

…and then some. From the eggs of the platypus to the eggs of dinosaurs, we’ll talk about how eggs are formed, why humans don’t lay them, and of course, why the egg definitely came before the chicken. CW: Placentas and afterbirth, body fluids, cursing