Nature is full of look-alikes. In the scientific world it is called mimicry. When it comes to snakes, it can mean the difference between life and death. The Coral snake has a twin that only can be detected by the avid herpetologist. For years, biologists believed the resemblance between the coral snake, and its harmless near-twins, the scarlet snake and scarlet king snake, was a classic case of mimicry. The impostors, scientists thought, adopted the coral's colorful bands as a survival mech...