Mosquitoes don't just bite you, they also pee on you.
11
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40