When cats are happy, they may squeeze their eyes shut.
10
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Bats sleep 18-20 hours per day.
5