The pyramids at Giza are usually described as the ultimate building project, millions of blocks stacked skyward by sheer human effort. A growing fringe of researchers and online theorists is now ...

Scientists have had to piece together clues as to how pyramids were constructed.

After using the "Relative Erosion Method" to uncover how old the Great Pyramid of Giza is, Alberto Donini suggests it may date to 22916 B.C.E.