Only 3% of bird species have penises.
0
The seahorse is the only fish to have a neck.
12
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
Sloths take two weeks to digest their food.
243
The largest earthworm on record was found in South Africa and measured 22 feet.
151