You do recall correctly! https://www.nationalgeographic.com/science/article/giza-pyramid-void-muon-radiography-cosmic-rays https://www.nationalgeographic.com/s

You do recall correctly! https://www.nationalgeographic.com/science/article/giza-pyramid-void-muon-radiography-cosmic-rays https://www.nationalgeographic.com/science/article/giza-pyra...