The elephant brain weighs about 6,000g.
274
The octopus does not have a blind spot.
273
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
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13