The Sumerians were the first known people to settle in Mesopotamia over 7,000 years ago, between the Tigris and Euphrates rivers (modern day Iraq). Sumer was often called the cradle of civilization. By the 4th millennium BC, it had established an advanced system writing, spectacular arts and architecture, astronomy and mathematics. The origin of the Sumerians remains a mystery till this day.
The Bosnian Pyramid of the Sun has now been confirmed as a man-made structure and part of a complex of three pyramids in the local area. Currently estimated to be over 20,000 years old, the discoveries raise fascinating questions about ancient European cultures and the level of technology they had. The main pyramid is larger than the Great Pyramid of Giza. We need to ask whether there was an Egyptian influence and be on the look out for more undiscovered ancient cities.