Eastern Diamondback Rattlesnake

The eastern diamondback rattlesnake is a very amazing kind of snake. It has special eyesight, just like when I talked about the duck-billed platypus. You see, it can see heat. Alright well, here is the catch: everything that is red is hot. Anything that is blue is cold. We humans made a kind of goggles which uses the same sort of technology as the snake does. And the rattle means "Step away or I'll attack." "Step away from the snake. Step away from the snake." Its rattle is made of keratin, the same thing our fingernails are made out of.

(photo from flickriver.com)