Dogs have been man's pet for over 14,000 years.
224
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
There's a rare breed of pig that looks like a sheep.
14
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6