Rattlesnake mating sessions have been known to last more than 22 hours.
232
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Denmark has twice as many pigs as there are people.
66
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A group of kittens is called a "kindle".
10
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16