They verified the theory of a new corridor in the Great Pyramid.
My take is that the corridor itself is not so important, but proving the layered disciplines used to locate the corridor work, is a big deal! It includes muon scans, ultra sound, infrared...stay tuned. There are more cavities suspected.

MAJOR DISCOVERY: Hidden Corridor Discovered in the Great Pyramid of Egypt
https://youtube.com/watch?v=1Tp2uOFGK7s