Sloths take two weeks to digest their food.
243
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
Cats and dogs can hear ultrasound.
350
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
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