Modern particle physics has teamed up with ancient Egyptian archaeology to discover a void in the Great Pyramid, similar in size to the Grand Gallery but located above it. Kunihiro Morishima of Nagoya University in Japan and colleagues used cosmic-ray muons and external micro-pattern gaseous detectors to perform the analog of X-ray tomography. In addition to confirming earlier results, it brings the significance of the void now to almost six standard deviations. Half of the muon detectors positioned around the pyramid, based on a design by CEA SACLAY, were built at CERN.