A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
On some poorly researched trivia lists it is stated as a fact that a pregnant goldfish is called a twit. This is not true as goldfish lay eggs.
71
Bats sleep 18-20 hours per day.
5
Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
Sheep, goats, octopuses, and toads have rectangular pupils.
7