A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
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
A domestic cat can sprint at about 31 miles per hour.
274
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
The colossal squid has the largest eyes in the world.
4