Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
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
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Two dogs were among the Titanic survivors.
262
Cats and dogs can hear ultrasound.
350
A 42-foot sperm whale has about 7 tons of oil in it.
209