Their number system was based on the number 60, They used this when they came up with 60 minutes in an hour and 360 degrees in a circle. We still use these divisions toda
Some historians think that the ziggurat in the city of Eridu was the Tower of Babel from the Bible.
Some of the city-states were quite large. Ur is thought to have been the largest and may have had a population of 65,000 people at its peak.
Their buildings and homes were made from sun-dried bricks.
The Sumerian language was eventually replaced by the Akkadian language around 2500 BC.
