Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Parrot parents "name" their children with a signature call.
112
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
When you shave a guinea pig it looks like a little hippo.
19