Neolithic engineers built megalithic monuments with stones weighing as much as two jumbo jets
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. 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 larger than the largest megaliths of Stonehenge, the most famous Neolithic wonder. Embedded … Read more