The Great Pyramid of Giza has been probed with the tools of modern particle physics by scientists who say they have discovered a huge, secret space hidden within its ancient walls.

The Great Pyramid of Giza has been probed with the tools of modern particle physics by scientists who say they have discovered a huge, secret space hidden within its ancient walls. It is located ...

Archaeology workers toil in front of the Great Pyramid, in Giza, Egypt, in 2010. Researchers say they've discovered a new room inside the ancient structure.