A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
Camels and llamas can cross breed. The offspring is called a ‘Cama’.
10
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13