Cats sleep for 70% of their lives.
8
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
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
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
A puppy is born blind, deaf, and toothless.
16