Even after 4,000 years, Egypt’s pyramids still exist in a shroud of mystery and fascination. A new study suggests that the Pyramid of Menkaure—the smallest of the three main pyramids at Giza—may be hiding a second entrance sealed inside its eastern wall.

Researchers from Cairo University and the Technical University of Munich spent three years scanning the monument using electrical resistivity, ground-penetrating radar, and ultrasonic testing. Their findings, published in NDT & E International, revealed two hollow spaces just a few feet behind the smooth limestone surface.

The eastern face has long stood out to archaeologists. Its blocks are unusually polished across an area roughly thirteen feet high and twenty feet wide, matching the finish seen at the pyramid’s known entrance on the n

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