Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
The largest earthworm on record was found in South Africa and measured 22 feet.
151
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17