A group of pugs is called a grumble.
10
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6