Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Early American humans hunted car-size armadillos and used their shells for houses.
12
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