Scientists map long-lost arm of the Nile that flowed past 31 pyramids

A now-extinct stretch of the Nile once flowed near Egypt’s Great Pyramid and likely played a key role in the construction of ancient monuments, according to new research.

Egypt’s Great Pyramid and other ancient monuments at Giza exist on an isolated strip of land at the edge of the Sahara Desert. The inhospitable location has long puzzled archaeologists, some of whom had found evidence that the Nile River once flowed near these pyramids in some capacity, facilitating the landmarks’ construction starting 4,700 years ago.

” Hidden traces of a lost waterway Traces of the river aren’t visible in aerial photos or in imagery from optical satellites, Ghoneim said. In fact, she only spotted something unexpected while studying radar satellite data of the wider area for ancient rivers and lakes that might reveal a new source of groundwater. “I am a geomorphologist, a paleohydrologist looking into landforms. I have this kind of trained eye,” she said.

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