Scientists have mapped a secret hidden corridor in Great Pyramid of Giza

Earlier submission now on front page:

https://news.ycombinator.com/item?id=35003679

Paper SAR doppler tomography model of the pyramid, by prof.Malanga & prof.Biondi, the paper is at https://www.mdpi.com/2072-4292/14/20/5231 video at https://www.youtube.com/watch?v=0r67rS864WU