Arguably no other animal on earth has been as important to humans as the wolf. They were gods in the Norse mythologies and nursed Romulus and Remus, the founders of Rome. Most importantly, the wolf was the first animal to ever be domesticated by man, a process still shrouded in mystery that took place well over 10,000 years ago. They have been our dearest friends and direst enemies, and yet there is still so much we don’t know about them.
Fact: Black wolves don’t occur naturally.
A 2008 study at Stanford University found that the mutation responsible for black fur occurs only in dogs, so black wolves are the result of gray wolves breeding back with domestic canines. The mutation is a dominant trait, like dark hair in humans, and is passed down to the majority of offspring. It is not entirely clear what benefit black fur has for the animals; they do not seem to be more successful hunters, but do show a marked improvement in immunity to certain infections. Black wolves are far more common in North America than they are in the rest of the world.