Sheep, goats, octopuses, and toads have rectangular pupils.
7
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Gorillas can catch human colds and other illnesses.
205
Only 3% of bird species have penises.
0
Early American humans hunted car-size armadillos and used their shells for houses.
12