A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
Cats recognise the voice of their owner, but never evolved to care.
22