How the The Sumerians Revolutionized Human Civilization *Marathon* | Ancient Aliens

The Sumerians in ancient Mesopotamia achieved over one hundred "firsts" for human civilization. Advances in writing, agriculture, science, mathematics, medicine, astronomy, transportation, building, military, schools and city planning, all originated in Sumer. See more in this marathon from Ancient Aliens.

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"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

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