Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Female kangaroos have three vaginas.
2
Rattlesnake mating sessions have been known to last more than 22 hours.
232
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Cows can sleep standing up, but they can only dream lying down.
745