Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
Some British police cars carry a teddy bear to console children after an accident.
46
One litter of kittens can be produced by more than one father.
57
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11
When dragonflies mate, their tails form a love heart.
22