Evolutionary Pressure and the Importance of Eyewear

CNN's John Sutter talks with evolutionary biologist Michael Masters about the evolution of modern humans. He asks how we get from modern human to sort of gray alien looking human without those kinds of pressures to push us in that direction. Unless perhaps we ourselves are taking an active role and hand in that evolutionary development, he says. "It's not hard to imagine this, a greater mastery over our own physiology"