In 1949, an official boxing match between a bear and a man was held. The bear won.
41
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
The Basenji dog is the only dog that is not able to bark.
4
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
When cats are happy, they may squeeze their eyes shut.
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