I Am So Tempted to Say that These European Crows Are Racists

In Europe, there are two groups of crows who are almost identical — except for for thing. Carrion crows are all black, while hooded crows have patches of gray. Each group prefers to mate with their own color. It sounds like what humans would call racism, but instead it's a lesson in the limits of anthropomorphism. »6/20/14 8:35pm6/20/14 8:35pm