Sumerian scientific achievements were important to the modern world.
Sumerians invented the wheel C. 3700 BC.
Sumerians developed a math system based on the numeral 60 which
was the basis of time in modern world.
Earliest concepts in algebra and geometry were formulated
Leather - Evidence exists for the use of
leather by the ancient Sumerians as far back as 6000 BC.
Preserved specimens of leather dating to 5000 BC have
been found. Egyptian stone carvings of about the same
date show leather workers. Egyptian leather sandals more
than 3,300 years old and an Egyptian queen's funeral tent
of gazelle hides made in 1100 BC are in museums.
A system of weights and measures were developed which served the
ancient world until the Roman period.
Many of the constellations were mapped by the Sumerians
Sumerians developed a complex system of sewers and flush
toilets to rid cities of waste and unhealthy affects of swamps.
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