Overview
- An international team from Cairo University and the Technical University of Munich used georadar, ultrasound, and electrical resistivity tomography to identify two air-filled anomalies behind the pyramid’s eastern façade.
- The voids sit directly behind a polished granite patch about 13 feet high by 20 feet wide on the eastern face, a location tied to a 2019 hypothesis proposing a second entrance by researcher Stijn van den Hoven.
- Measured dimensions indicate one cavity begins roughly 4.6 feet behind the surface and is about 3.2 feet high by 4.9 feet wide, while the other starts around 3.7 feet back and measures about 3 feet high by 2.3 feet wide.
- Findings were detailed in the journal NDT & E International, with TUM professor Christian Grosse calling a secondary entrance "very plausible" based on the combined non-invasive data.
- Researchers caution that penetration limits make the anomalies’ full extent unclear, as Egypt’s Ministry of Antiquities prepares near-term robotic and fiber‑optic inspections to visually assess the features.