C-sections might be relaxing the evolutionary pressure against big babies

Theoretical biologist Philipp Mitteröcker is intrigued by the puzzle of dangerous human childbirth. Unlike other species, human babies are often too big for the birth canal, leading to dangerous—and possibly fatal—obstructed labor. Last year, Mitteröcker and his colleagues published a mathematical model that showed how the mixture of evolutionary pressures acting on humans would inevitably […]