Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Whales and dolphins can't taste anything other than salt.
11
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
Cats recognise the voice of their owner, but never evolved to care.
22
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6