Rattlesnake mating sessions have been known to last more than 22 hours.
232
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The cat brain weighs about 30g.
167
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
The largest earthworm on record was found in South Africa and measured 22 feet.
151
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
A group of kittens is called a "kindle".
10