The cat brain weighs about 30g.
167
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Rattlesnake mating sessions have been known to last more than 22 hours.
232