[Photo] Corn Snake. Credit: Grace Pryor and David Hu, New York University

Snakes have no ears. Most see about as well as Mr. Magoo. They don't have noses but they can smell very adeptly. The fangs of venomous snakes, which evolved from teeth, are among "the most advanced bioweapon systems in the natural world," says Freek Vonk of Leiden University in the Netherlands. "There is not a comparable structure as advanced, as sophisticated, as for example a rattlesnake fang and venom gland." And those interesting tales aren't even on this list!