The Mayan culture dates back to 3000 BC. They developed a system of writing called glyphs. This system used a combination of pictures to represent ideas and symbols to represent sounds. They combined these glyphs into groups. The Mayans used more than 800 glyphs. They also created a very sophisticated system of mathematics. In fact, they were the first ones to use zero. This system was more advanced than those being used by the ancient Romans, Greeks, and Egyptians.