A recent thermographic survey of the Giza Pyramids has uncovered a number of strange anomalies, including the possible presence of a previously-unknown passageway in the Great Pyramid itself.

Using Forward-looking infrared cameras, a research team with Egypt’s Ministry of Antiquities scanned the pyramids during sunrise, as the sun heats their structures, and also during sunset, as the megaliths cool. This allowed the team to see temperature changes in the structure of the pyramids, which would indicate the presence of passageways, internal air flows, and differences in building materials.
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