Bats sleep 18-20 hours per day.
5
Cats and dogs can hear ultrasound.
350
Sloths take two weeks to digest their food.
243
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
In 1949, an official boxing match between a bear and a man was held. The bear won.
41