The pyramids of Egypt have held their secrets for more than 4,500 years.
Now, 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.
Last week, archaeologists revealed the first results of their work involving the Bent pyramid, 25 miles south of Cairo.
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.
Located at the royal necropolis of Dahshur, the Bent pyramid was one of the earliest to be built under the Old Kingdom Pharaoh Sneferu.
Mehdi Tayoubi, president of the Heritage Innovation Preservation Institute, said that plates installed inside the pyramid collected data on radiographic particles known as 'muons'.
Muons rain down from the Earth's atmosphere. The particles pass through empty spaces but can be absorbed or deflected by harder surfaces.
By studying particle accumulations, scientists may learn more about the construction of the pyramid
It has two entrances, which opens onto two corridors leading to two burial chambers arranged one above the other.
Some had suggested pharaoh Sneferu was buried inside the pyramid in an hidden chamber, but the latest scans have ruled out that possibility.
WHAT TECHNOLOGY ARE THEY USING TO PEER INSIDE PYRAMIDS?
Infrared thermography - Infrared detects infrared energy emitted from object, converts it to temperature, and displays an image of its temperature distribution to reveal objects that may be hidden.
3D scans with lasers - Lasers bounce narrow pulses of light off the interiors of a structure to map it in detail. Once the scanning is complete, the data can be combined into a highly detailed 3-D model.
Cosmic-ray detectors - This detects muons that are created when cosmic rays hit the atmosphere. Muons pass harmlessly through people and buildings.
Muons traveling through rock or other dense material will slow and eventually stop. The idea is to catch the muons after theyve passed through an pyramid and measure their energies and trajectories. Researchers can then compile a 3D image that reveals hidden chambers.