Jellyfish as a species are actually older than dinosaurs and sharks.
383
Only 3% of bird species have penises.
0
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19