Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
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
A cow produces around 200,000 glasses of milk in her lifetime.
373
The reindeer is the only mammal that can see UV light.
17
A puppy is born blind, deaf, and toothless.
16