The reindeer is the only mammal that can see UV light.
17
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Sharks have been on the planet longer than trees.
14
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10