Researchers uncovered a system of dots and Y-shaped marks which they believe were used to track the mating and birthing seasons of animals that served as important sources of food for hunter-gatherers in Stone Age Europe. For decades, experts have believed that the first writing systems in human history were the pictographic and cuneiform languages that emerged in Sumer in approximately 3,400 B.C.E. But now, researchers say that the invention of written language may have actually taken place 14,000 years earlier than we thought ?" and it's all thanks to an amateur sleuth who was simply browsing through images online.