Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There's a rare breed of pig that looks like a sheep.
14
Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
11