Only 3% of bird species have penises.
0
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
The Basenji dog is the only dog that is not able to bark.
4
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20