Located near Antequera in Malaga (Andalucia, Spain), Menga is part of a UNESCO World Heritage site consisting of three dolmens constructed between 3800 – 3600 BC. It is one of the largest megalithic structures in Europe and was built on the top of a hill with giant rocks. It is renowned for its enormous orthostats or vertical stones, one of which weighs nearly 150 tons...Using petrographic and stratigraphic analysis techniques, the researchers discovered most of the stones were calcarenites... The researchers write in their paper that moving and building a dolmen from such large, massive but fragile stones would require...