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"The sexagesimal part of this system survives in the modern era in units of time (seconds and minutes) and of trigonometry (360 degrees)."

"The sexagesimal part of this system survives in the modern era in units of time (seconds and minutes) and of trigonometry (360 degrees)."

"The Sumerian writing system was adopted and modified by other contemporaneous Mesopotamian people such as the Akkadians and the Babylonians. As a spoken language, Sumerian died out around the 18th century BCE, but continued as a "learned" written language (much like Latin was during the Middle Ages in Europe). In this way, Sumerian was used continually until the 1st century CE, making it one of the longest used writing system in history."

"Sumerian was spoken in Sumer in southern Mesopotamia (part of modern Iraq) from perhaps the 4th millennium BC until about 2,000 BC, when it was replaced by Akkadian as a spoken language, though continued to be used in writing for religious, artistic and scholarly purposes until about the 1st century AD. Sumerian is not related to any other known language so is classified as a language isolate."

"Sumerian Language & Climate: Long Drought Killed Off Ancient Tongue, Research Suggests"

"The Sumerians had developed an abstract form of writing based on cuneiform (i.e. wedge-shaped) symbols. Their symbols were written on wet clay tablets which were baked in the hot sun and many thousands of these tablets have survived to this day. It was the use of a stylus on a clay medium that led to the use of cuneiform symbols since curved lines could not be drawn. The later Babylonians adopted the same style of cuneiform writing on clay tablets."

"The purpose of this page is to provide a source of information on all aspects of Mesopotamian mathematics. We explain the origins of mathematics in Mesopotamia from the earliest tokens, through the development of Sumerian mathematics to the grand flowering in the Old Babylonian period, and on into the later periods of Mesopotamian history. We include some general surveys to get you oriented in each period, and some more detailed resources for those interested in specific aspects of this fascinating episode in history. Like most other Web pages it is under slow construction as time permits. Some of these resources are of general interest, others are intended mainly for use by students in my History of Mathematics class. "