An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Tigers can see 6 times better at night than humans.
305
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
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Lurch, a Watusi bull, had the largest horns in the world.
32