The reindeer is the only mammal that can see UV light.
17
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
A giraffe's kick is so powerful that it can decapitate a lion.
216
Parrot parents "name" their children with a signature call.
112
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10