Neat News 673 (added 2017-11-03)
Cavity in Cheops Pyramid Detected
The Great Pyramid is some 4500 years old. If contains three big chambers, one in the foundations, the King's chamber, and the Queen's chamber. These have been known for a while, however, now another cavity has been detected which may be 30 metres long and several metres high. It may have been undisturbed all these years. It is currently unclear why it is here. It has been detected by measurements of the density structure of the pyramid.
