Cats recognise the voice of their owner, but never evolved to care.
22
Rattlesnake mating sessions have been known to last more than 22 hours.
232
The largest earthworm on record was found in South Africa and measured 22 feet.
151
The octopus does not have a blind spot.
273
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45