The cat brain weighs about 30g.
167
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
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
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19