A group of kittens is called a "kindle".
10
Dolphins have names for one another.
18
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11
One litter of kittens can be produced by more than one father.
57