Thermal 'anomalies' were detected on the Great Pyramid.

A 3D graphic shows the known structures inside the Khufu pyramid

‘Such void is shaped like a corridor and could go up inside the pyramid,’ Mehdi Tayoubi, founder of the Paris-based Heritage Innovation Preservation Institute, told Seeker.

He said that currently no link can be made between the two cavities.

Operation ScanPyramids began in October last year to search for hidden rooms inside Khufu and its neighbour Khafre in Giza, as well as the Bent and Red pyramids in Dahshur, all south of Cairo.

The project applies a mix of infrared thermography, muon radiography imaging and 3D reconstruction – all of which the researchers say are non-invasive and non-destructive techniques.

Previous scans using muons at the Bent Pyramid, 25 miles south of Cairo, gave the first detailed scans of the pyramid’s internal structure. The 3D images show the internal chambers of the 4,600-year-old structure, as well as clearly revealing the shape of its second chamber, 60 feet above it (illustrated)

The Bent Pyramid in Dahshur (pictured), is distinguished by the bent slope of its sides. It has two entrances, which opens onto two corridors leading to two burial chambers arranged one above the other

Egyptian and foreign experts have begun unraveling their mysteries with the help of space particles. The team are using ‘cosmic rays’ to create maps that show the internal structures of these ancient wonders – and they say they could hold some surprises

Thermal ‘anomalies’ were detected on the Great Pyramid. the three stones with greater temperatures than the surrounding stones (shown in red) first raised hopes there may be a hidden chamber inside

Dr Zahi Hawass (pictured outside the Great Pyramid), a leading Egyptian archaeologist and Egypt’s former head of antiquities has been working with a team of French researchers who have been conducting the scans

Scientists have been using a muon detecting machine (pictured) to scan the internal structure of the Great Pyramid of Giza

The project will begin south of Cairo with the scanning of the so-called Bent Pyramid at Dashour, followed by the nearby Red Pyramid. Later, the two largest pyramids on the Giza plateau will also be scanned. The structures are over 4,500 years old

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