In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
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
Sharks, like other fish, have their reproductive organs in their chests.
248
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109