Archeologists have spent centuries wondering how the towering pyramids of Giza were constructed thousands of years ago. Now, the discovery of a sophisticated ramp system has put them one step closer to solving the mystery.
원문출처 : https://www.cnn.com/travel/article/giza-pyramids-ramp-scli-intl/index.html
원문출처 : https://www.cnn.com/travel/article/giza-pyramids-ramp-scli-intl/index.html