For decades, experts have struggled to explain how Egypt’s Great Pyramid was built — but now a new study claims to have found an answer. The construction would have required ancient workers to lift and place millions of huge stone (some weighing up to 15 tons) without using modern machinery,

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The Pyramid of Menkaure on the Giza Plateau may have a previously unknown entrance.

Have they finally solved the ancient Egyptians’ pyramid scheme? Aliens might not have built the pyramids — but the ancient Egyptians might’ve had a pretty cool hack nonetheless. A cutting-edge 3D model suggests that the Great Pyramid of Giza was constructed using a special concealed ramp that might’ve allowed them to build it in less than two decades,