Rattlesnake mating sessions have been known to last more than 22 hours.
232
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Sloths take two weeks to digest their food.
243
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8