When cats are happy, they may squeeze their eyes shut.
10
There was a cable network called The Puppy Channel that, for 3 years, broadcast only broadcast footage of puppies playing.
1
Dolphins have names for one another.
18
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
When dragonflies mate, their tails form a love heart.
22
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