Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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When dragonflies mate, their tails form a love heart.
22
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
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
A dork is a whale's penis.
327
There's a rare breed of pig that looks like a sheep.
14
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271