When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
Sloths take two weeks to digest their food.
243
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9