A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25