The mystery of how ancient Egyptians built the pyramids has ... While theories have ranged from massive labor forces to the use of ramps and sleds, new research suggests that an advanced yet ...

It's thought that they may have used a combination of ramps and a pulley system to heave the sleds up to the height they needed. It's no accident that the Ancient Egyptians didn't leave any ...

Researchers discovered sled-like drag marks alongside ancient footprints at White Sands National Park in New Mexico — potentially the oldest human footprint site in North America. Indigenous ...