There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Only 3% of bird species have penises.
0
Dogs sometimes fake being sick to get attention.
26
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17