Bats sleep 18-20 hours per day.
5
Cats recognise the voice of their owner, but never evolved to care.
22
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
A puppy is born blind, deaf, and toothless.
16
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
Sloths take two weeks to digest their food.
243