Valentine's Day is all about the hearts: heart-shaped chocolates, cards, balloons and even pizza. But the heart hasn't always ...

The heart-on-fire emoji is a symbol of passion or lust ... When to skip: Any time you are trying to be really romantic. (Many folks find this version of the heart a little icky.) ...

the heart is most often represented in European art from the Middle Ages onwards in a more anatomically correct manner than the symbol we have come to know and love. Many pre-modern hearts feature ...

The popular icon of the heart continues to be important in many cultures. In the Voodoo religion, the heart becomes the symbol of Erzulie, the loa of love, beauty, and purity. In Africa ...

But the heart hasn't always just been a symbol of romance ... that the heart was more than just a muscle and may explain why many early cultures viewed the heart as possessing a life force ...