A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
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
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Penguins have a gland above their eye that turns saltwater into freshwater.
12