Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
Two dogs were among the Titanic survivors.
262
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45