Bats sleep 18-20 hours per day.
5
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
Sharks, like other fish, have their reproductive organs in their chests.
248
A cow produces around 200,000 glasses of milk in her lifetime.
373
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20