Our earliest mammalian ancestors avoided the dominant dinosaurs by only coming out at night and having uniformly dark, ...

Both black and white rhinoceroses are actually gray. They are different not in color ... The difference in lip shape is related to the animals' diets. Black rhinos are browsers that get most ...

For most animal biologists, seeing an all-black variant of their ... At that locus, each wolf has two copies of a color gene, of which there are two possible alleles: gray or black, the latter being ...