The elephant brain weighs about 6,000g.
274
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
Sheep, goats, octopuses, and toads have rectangular pupils.
7
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12