One litter of kittens can be produced by more than one father.
57
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
A puppy is born blind, deaf, and toothless.
16