A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Sloths take two weeks to digest their food.
243
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
Nicole Kidman is scared of butterflies.
65
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
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12