The reindeer is the only mammal that can see UV light.
17
When cats are happy, they may squeeze their eyes shut.
10
Mosquitoes don't just bite you, they also pee on you.
11
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
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8