My own thesis is that when modern humans and Neanderthals co-existed, they would have appeared uglier to our ancestors than they do to us - because we are no lo

My own thesis is that when modern humans and Neanderthals co-existed, they would have appeared uglier to our ancestors than they do to us - because we are no longer subject to selective pressure to avoid mating with Neanderthals. http://thinkinghard.com/blog/WereTheNeanderthalsUgly.html http://thinkinghard.com/blog/WereTheNeanderthalsUgly.html (2006)