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 ...

In episode two, DI Luke Bascombe, played by Ashley Walters, learns that he completely misinterpreted a series of emojis left by Katie on Jamie's Instagram profile, believing they were flirtatious.