Some ribbon worms will eat themselves if they can't find any food.
-33
Cat urine glows under a black-light!
43
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A rodent's teeth never stop growing.
16
A fall of 30 feet can be survived by most cats.
10
It was discovered on a space mission that a frog can throw up.
52
The average housefly lives only two weeks.
39