Sloths take two weeks to digest their food.
243
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Early American humans hunted car-size armadillos and used their shells for houses.
12
The oldest recorded elephant lived for 82 years.
213
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
Jellyfish as a species are actually older than dinosaurs and sharks.
383
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45