Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
When the "Elephant Whisperer" Lawrence Anthony died, a whole herd of elephants arrived at his house to mourn him.
25
Two dogs were among the Titanic survivors.
262
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
Cows can sleep standing up, but they can only dream lying down.
745