On Valentine's Day, men and women around the world celebrate those closest to them with extravagant acts of love. Cards, chocolates, and other gifts are exchanged, all of them bedazzled with or designed in the form of traditional hearts. But how did this shape, ostensibly modeled after the internal organ, emerge as the universal symbol for the emotion of love? Although the heart symbol can be traced back many generations, nobody is really sure … [Read more...]