Scientists may have solved the mystery behind Egypt's pyramids


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

A research team from the University of North Carolina has discovered that the pyramids were likely built along an ancient branch of the Nile River – which is now hidden beneath desert and farmland. 

For many years, archaeologists have thought that the ancient Egyptians may have used a nearby waterway to transport materials such as stone blocks to build the pyramids. 

But until now, "no one has been sure about the location, shape and size of this waterway to the pyramids area," according to one of the authors of the study, Eman Ghoneim. 

The team found that the river tributary – named the Ahramat tributary – was 64 kilometers long and between 200-700 meters wide, the BBC reported. 

And it was bordered by 31 pyramids which were built between 4700-3700 years ago. 

The team explained that the ancient Egyptians may have used the power of the river to carry the heavy blocks, instead of people.