Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Mosquitoes don't just bite you, they also pee on you.
11
One in three dog owners say they have talked to their pets on the phone.
427
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
There's a rare breed of pig that looks like a sheep.
14