(CNN) — 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. The remains of the 4,500-year-old ramp was found at an alabaster quarry -- of the same period -- in an Egyptian desert by a team of researchers from the University of Liverpool, UK, and Cairo's French Institute for Oriental Archaeology. unearthed a 30-meter-long space hidden within the limestone and granite walls of the Pyramid of Giza. In 2017, Egyptian archaeologists made headlines around the world when theyunearthed a 30-meter-long space hidden within the limestone and granite walls of the Pyramid of Giza.

Source: CNN November 06, 2018 12:45 UTC