Neolithic engineers built megalithic monuments with stones equal to the weight of two jumbo jets
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific advances and more. Each of the 32 giant stones that make up the 5,600-year-old megalithic monument Menga Dolmen in southern Spain is many times larger than the largest megaliths at Stonehenge, the most famous wonder of the Neolithic… Read More »