A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Condoms were originally made of animal intestines or linen.
347
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
When dragonflies mate, their tails form a love heart.
22
The seahorse is the only fish to have a neck.
12