Early American humans hunted car-size armadillos and used their shells for houses.
12
Whales and dolphins can't taste anything other than salt.
11
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
A 42-foot sperm whale has about 7 tons of oil in it.
209
Penguins have a gland above their eye that turns saltwater into freshwater.
12