CNN —Each of the 32 colossal stones that make up the Menga Dolmen, a 5,600-year-old megalithic monument in southern Spain, is many times bigger than the largest megaliths at Stonehenge, the most famous Neolithic wonder. The upright stones that make up the walls of the chamber were not perfectly vertical, tilting inward at a gentle angle to make the building narrower at the roof than at the floor and creating a trapezoid-shaped chamber. The team calculated that each of the upright stones lean inward at a largely uniform angle of 84 to 85 degrees. The upright stones that form the walls also lean sideways against one another at a consistent angle. The Menga Dolmen sits atop a hill near Antequera, Spain.

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Persons: ”, Leonardo García Sanjuán, “, it’s, “ I’d, Mike Parker, Pearson, ” Parker, Pearson wasn’t, José Antonio Lozano Rodríguez, plumb, Miguel Ángel Blanco, García Sanjuán, Parker, Leonardo García, We’ve Organizations: CNN, Boeing, Spain’s University of Seville, University College London, Oceanographic Center Locations: Spain, Europe, Antequera