Pyramid formation: researchers unlock a secret underlying their construction. From the article:

Scientists believe they may have solved the mystery of how 31 pyramids, including the world-famous Giza complex, were built in Egypt more than 4,000 years ago.

A research team from the University of North Carolina Wilmington has discovered that the pyramids are likely to have been built along a long-lost, ancient branch of the River Nile – which is now hidden under desert and farmland….

In a cross-continental effort, the group of researchers used radar satellite imagery, historical maps, geophysical surveys, and sediment coring (a technique used by archaeologists to recover evidence from samples) to map the river branch – which they believe was buried by a major drought and sandstorms thousands of years ago.

The team were able to “penetrate the sand surface and produce images of hidden features” by using the radar technology, the study, published in the journal Communications Earth and Environment, said.

Among those features were “buried rivers and ancient structures” running at the foothills of where the “vast majority of the Ancient Egyptian pyramids lie,” Prof [Eman] Ghoneim said.

For the scientific article, see here.