One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Lurch, a Watusi bull, had the largest horns in the world.
32
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Lobsters have blue blood.
476
A group of kittens is called a "kindle".
10
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12