If you watch enough 'Jaws' and Shark Week, you’re bound to see sharks as ravenous death machines. But is it really more appropriate to think of these ancient creatures as LIFE machines? In this episode of the Stuff to Blow Your Mind podcast, Robert and Christian welcome 'Sex in the Sea' author Marah Hardt back on the podcast for a discussion of embryonic cannibalism, virgin shark birth, conservation efforts and more.