Mosquitoes don't just bite you, they also pee on you.
11
Cats and dogs can hear ultrasound.
350
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16