Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
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
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
The Basenji dog is the only dog that is not able to bark.
4
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
The largest earthworm on record was found in South Africa and measured 22 feet.
151