I understand that the red, yellow and green lines give a general idea of how bad traffic is on a road, but do they have any specific meaning, like red equals a 40-minute wait at a toll bridge? a. According to the Google Maps site, the colored lines representing traffic conditions on major highways refer to the speed at which one can travel on that road.
The oldest form of writing known to man is Cuneiform used in Mesopatamia.
Age. Speech goes back to human beginnings, perhaps a million years ago. Writing is relatively recent, however; it was first invented by the Sumerians, in Mesopotamia, around 3200 B.C. Since then, the idea of writing has spread around the world and different writing systems have evolved in different parts of the world.