When you think of a heart, you likely picture the sweet little symbol that is seen in illustration, homewares and emojis.

It turns out that the classic red heart symbol we see almost everywhere around Valentine's Day doesn't look much like a real human heart at all. "Of all the theories about where that symbol comes ...

National Library of Medicine. 10,000-8,000 B.C.E. The heart symbol, the popular icon for the heart, can be traced to before the last Ice Age. Cro-Magnon hunters in Europe use the symbol in ...