Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Sloths take two weeks to digest their food.
243
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
The cicada, a fly found in Africa, spends 17 years of its life sleeping; and only two weeks is awake during which mates and then dies.
33
A female ferret will die if it goes into heat and cannot find a mate.
143
Only female mosquitoes bite and drink blood.
28
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The energy of a discharge of an electric eel could start 50 cars.
53