Lancelot Drink and Headless Slugs

What separates us from the primates? Opposable thumbs? Self-awareness? What if it's water efficiency? Anthony and Jeff discuss a new study just might provide an answer an age-old question in an entirely new way. Then, researchers have discovered a kind of sea slug that can cut it's own head off and regrow its body over a series of weeks. Jeff and Anthony wonder what THAT'S like.