Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
When dragonflies mate, their tails form a love heart.
22
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Dogs sometimes fake being sick to get attention.
26