A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Cows can sleep standing up, but they can only dream lying down.
745
Dogs sometimes fake being sick to get attention.
26
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12