Human Birth Canals Are Seriously Twisted. Researchers Think They've Figured Out Why

Why do humans possess a twisted birth canal?

News at a glance: Climate promises, a predatory ‘Hydra’ publisher, and tracking the birth of elements

r/space! We've just unveiled our new 5-part series, NOVA Universe Revealed. Take a ringside seat as we explore everything from stars to the Milky Way to alien worlds to black holes and the birth of the universe as we know it: