The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Condoms were originally made of animal intestines or linen.
347
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Parrot parents "name" their children with a signature call.
112
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Tigers can see 6 times better at night than humans.
305
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