Sometimes the common names for animals can end up being rather confusing. For example, guinea pigs are not related to pigs and neither are they native to Guinea. In the case of American black bears, not all of them are black. In fact, they come in a range of colors, including brown (also known as cinnamon), blond, or bluish-grey, and some even have coats with mixed colors.  Scientists have wondered why there is this diversity in coat color among black bears. Some have hypothesized that the cinnamon...