Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...

The animal kingdom has so many stranger-than-fiction animals. From a glowing green sea slug to a lizard with a toad's head, these weird animals are some of the most fascinating creatures in the animal ...

Williams recognized the extremely rare bilateral color variation, a mutation he had previously read about in lobsters and observed in an American redstart bird. The class brought the crayfish back to ...

We all know what chameleons are capable of: changing into a variety of colors to match their surroundings. They're one of the ...