A multi-institutional team of historians, geologists, physicists, and archaeologists in Spain has developed a theory to explain how a neolithic culture could have built the Menga dolmen, an ancient structure consisting of stones weighing up to 150 metric tons. A multi-institutional team of historians, geologists, physicists, and archaeologists in Spain has developed a theory to explain how a neolithic culture could have built the Menga dolmen, an ancient structure consisting of stones weighing up to 150 metric tons. Archaeology Phys.org – latest science and technology news stories