Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Cows can sleep standing up, but they can only dream lying down.
745
Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
11
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
The largest earthworm on record was found in South Africa and measured 22 feet.
151
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9