Photo: MANJIK/Depositphotos

The pyramids have stunned onlookers for centuries.

Giza, Egypt, is home to the Great Sphinx and pyramids enshrouding ancient pharaohs.

They discovered the presence of an ancient, buried riverbed that once ran alongside the 31 pyramids.

How Did Egyptians Build Pyramids? New Study Suggests Answer

Photo: MANJIK/Depositphotos

Eventually, the river branch would be buried under the desert.

Uncovering ancient waterways explains the locations of structures and movement of ancient peoples.

Depiction of the ancient Ahramat Branch on modern maps.

How Did Egyptians Build Pyramids? New Study Suggests Answer

Pyramid causeways and the Giza Inlet. (Photo:Author Eman Ghoneim/Ghoneim et al.)

(Photo:ESRI World Image Basemap, source: Esri, Maxar, Earthstar Geographics/Ghoneim et al.)

How Did Egyptians Build Pyramids? New Study Suggests Answer

Depiction of the ancient Ahramat Branch on modern maps. (Photo:ESRI World Image Basemap, source: Esri, Maxar, Earthstar Geographics/Ghoneim et al.)