An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
When cats are happy, they may squeeze their eyes shut.
10
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Bats sleep 18-20 hours per day.
5