Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18
Tigers, leopards, and jaguars love "Calvin Klein's Obsession for Men". The scent is used to attract animals to cameras in the wilderness, and was even a turn on for one pair of Jaguars who were subject to it.
17
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
Ants have tiny magnetic compasses in their antennae which help them navigate.
9