When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
When dragonflies mate, their tails form a love heart.
22
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6