Cats recognise the voice of their owner, but never evolved to care.
22
Lobsters have blue blood.
476
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
Sloths take two weeks to digest their food.
243
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
Alligators can live up to 100 years.
337