Here's the original study: http://www.pnas.org/content/early/2011/09/28/1104210108 http://www.pnas.org/content/early/2011/09/28/1104210108 It's really quite fa

Here's the original study: http://www.pnas.org/content/early/2011/09/28/1104210108 http://www.pnas.org/content/early/2011/09/28/1104210108 It's really quite fascinating.