When dragonflies mate, their tails form a love heart.
22
Sloths take two weeks to digest their food.
243
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Dogs sometimes fake being sick to get attention.
26
When cats are happy, they may squeeze their eyes shut.
10
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268