Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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The desire to squeeze and hug cute things comes from the same place in your brain as aggression.
65
When dragonflies mate, their tails form a love heart.
22
One litter of kittens can be produced by more than one father.
57
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16