When it comes to the animal kingdom, anything goes, it seems. From sounds heard miles away to spontaneous sex changes, these little-known facts were probably not discussed in that high school biology class you took.
Turns out that chameleons don't change color in order to blend in with their surroundings. They aren't trying to blend in to the background. Rather, they are displaying their emotions. So if a chameleon blushes red, he's either mad as hell or darned happy to see you.