Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When dragonflies mate, their tails form a love heart.
22
One litter of kittens can be produced by more than one father.
57
Dolphins have names for one another.
18
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Some British police cars carry a teddy bear to console children after an accident.
46
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
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