A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
Sloths take two weeks to digest their food.
243
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
Giant Anteaters' front legs look like a panda.
48
Whales and dolphins can't taste anything other than salt.
11