Cats recognise the voice of their owner, but never evolved to care.
22
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
The head of a jellyfish is called the "Bell."
6
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The octopus does not have a blind spot.
273
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
The cat brain weighs about 30g.
167