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
Dogs have been man's pet for over 14,000 years.
224
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
The oldest recorded elephant lived for 82 years.
213
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
When dragonflies mate, their tails form a love heart.
22
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2