How was the Great Pyramid built? New research points to 4 internal ramps

A new study suggests the answer to one of history’s greatest engineering mysteries may have been hidden inside the Great Pyramid of Giza all along.
来自MSN

Space discovery shows that the pyramids were built using ingenious method

A landmark discovery on an ancient branch of the River Nile may have solved the mystery of how the pyramids in Egypt were built centuries ago. The now dried-out waterway, which once ran through Giza ...