Or global warming?
Via ABC:
While the discovery of “thermal anomalies” at Egypt’s Giza pyramids by an international group of scientists and archaeologists is prompting worldwide interest, with speculation that they may indicate undiscovered secret chambers, experts say it’s too early to jump to any conclusions.
Teams at the faculty of engineering at Cairo University and at the Heritage Innovation Preservation Institute launched a project on Oct. 25 called the #ScanPyramids project with the aim of scanning the largest pyramids of Egypt — Khufu, Khafre, the Bent and the Red pyramids — using infrared thermography, for one year.