A new study suggests that Egyptians may have used water to help move the massive stones to build the pyramids.
Throughout history, people have tried to figure out how all those giants blocks of stone were moved across the desert and stacked up high.
Physicists from the University of Amsterdam and the Foundation for Fundamental Research on Matter believe they have an answer as to how those stones were moved.
The first part of the equation is that stones and statues were placed on sledges and pulled across the sand.
The physicists say the correct amount of dampness in the sand halves the amount of pulling force required to move a sledge with a huge stone on it.