Forbes: Mysterious Void In Great Pyramid Discovered Using Cosmic Rays

You’ve probably heard about cosmic rays, or maybe you think they’re some kind of space-laser-beam thing. Actually, ‘cosmic rays’ is the term used by scientists to describe high-energy radiation originating from outside our atmosphere and from the depths of space:

https://www.forbes.com/sites/meriameberboucha/2017/11/07/mysterious-void-in-great-pyramid-discovered-using-cosmic-rays/#85c059d4700c