The study, Scan Pyramids, found an interesting thermal anomaly in the Great Pyramid. The researchers used “infrared thermography, muon radiography, and 3-D reconstruction” to examine the pyramids for any internal structures or cavities.
Rossella Lorenzi via Discovery News:
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Several thermal anomalies were observed in all the monuments, but one remarkable anomaly was detected in the Great Pyramid, known as Khufu or Cheops.
“This anomaly is really quite impressive and it’s just in front of us, at the ground level,” Mehdi Tayoubi, founder of the Paris-based Heritage Innovation Preservation Institute, told Discovery News.
Thermal measurements were carried out at different times in order to observe the pyramids during their warm-up phase from early morning until sunrise and during their cooling phase from late afternoon until sun set and early night.
“In cooling phase, the heat transfer is usually happening from the inside to the outside; while in heating phase, it is the opposite,” the researchers said.