The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
The elephant brain weighs about 6,000g.
274
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255