http://www.newsweek.com/ancient-egypt-how-i-discovered-ramp-might-have-been-used-build-gizas-great-1207432

What began as an expedition to record the inscriptions of ancient Egyptian quarry workers produced a remarkable discovery about the Great Pyramid at Giza. My colleagues and I in the Anglo-French joint archaeological mission to the ancient quarry site of Hatnub recently revealed the existence of a well-preserved haulage ramp dating to the time of the Great Pyramid, roughly 4,500 years ago.

We think this could significantly change the theories about how the workers who built the monument were able to transport such large blocks of stone to great heights. It could even provide evidence that pulleys were invented hundreds of years earlier than previously documented.