The Turgai geoglyphs, a number of massive earth constructions arranged in geometric shapes the size of several football fields located in the Turgai Trough in northern Kazakhstan, once captured global attention and became one of the most sensational discoveries in the country’s history. The mysterious earthworks dating back approximately 8,000 years ago have seized scientists’ minds since they were found 16 years ago. ECI reports, citing The Astana Times.