When dragonflies mate, their tails form a love heart.
22
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Dolphins have names for one another.
18
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
A new born kangaroo is small enough to fit in a spoon!
7
One litter of kittens can be produced by more than one father.
57