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
A new born kangaroo is small enough to fit in a spoon!
7
Dolphins have names for one another.
18
A puppy is born blind, deaf, and toothless.
16
A group of kittens is called a "kindle".
10