600 Meters Below the Pyramids - or an Exaggeration?
Biondi's SAR Tomography: 80-meter chambers and 600-meter shafts beneath Giza. A critical analysis between sensation and skepticism.
9 min
January 2026. Millions listen as Filippo Biondi speaks on the Joe Rogan Podcast about structures that challenge everything: Massive hollow spaces beneath the pyramids, detected with radar from space. Either the discovery of the century - or one of the greatest exaggerations.
The Man
Filippo Biondi is no charlatan. [Filippo Biondi - MDPI Remote Sensing 2022]
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Aspect
Detail
Education
PhD in Electronic Engineering, University of Strathclyde
Publications
Legitimate papers on SAR technology (IEEE, Remote Sensing)
Employer
Connections to NASA, ESA (according to his own claims)
Expertise
Synthetic Aperture Radar (SAR) - Remote Sensing
Biondi is a real scientist with real qualifications in a real field. This makes his claims harder to ignore - and harder to accept.
The Claims
Between 2022-2026, Biondi presented the following discoveries:
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Structure
Claimed Details
Vertical Shafts
8 cylindrical shafts
Depth
600-648 meters
Cubic Chambers
2 hollow spaces, each 80 x 80 x 80 meters
Location
Beneath the Khafre Pyramid
Method
SAR Tomography with 4 satellite systems
The satellite systems according to Biondi: Umbra Space, Capella Space, ICEYE, Cosmo-SkyMed.
The claimed validation: Gran Sasso Laboratory (LNGS) in Italy.
The Physical Question
This is where the problem begins. [Dr. Lawrence Conyers - Criticism]
SAR (Synthetic Aperture Radar) works by sending radar waves from a satellite and analyzing the reflected signal. The technology is proven for:
Terrain mapping
Movement measurement (subsidence, earthquakes)
Structure detection under vegetation
The problem: Radar waves do not penetrate deeply into dense rock.
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Medium
Typical SAR Penetration
Dry Sand
2-5 meters
Wet Soil
< 1 meter
Solid Rock
Max. ~15 meters (under ideal conditions)
Biondi's claim: 600 meters.
That is 40 times deeper than the known physical limit.
Loading SAR visualization...
SAR Tomography - Hypothetical Representation of Biondi's Claims
The Critics
The opponents have names, faces, and concrete arguments. They deserve to be heard:
Snopes Rating: FALSE (based on physical objections) [Snopes Fact-Check 2025]
The Supporters
Joe Rogan Podcast Reach: Millions of listeners worldwide [Joe Rogan Experience #2443]
Legitimate Publications: Biondi has genuine papers in genuine journals (MDPI Remote Sensing)
Gran Sasso Claim: If the LNGS actually validated his methodology, that would be significant - but this validation was never independently confirmed.
The Problematic Co-Author
Another factor: Corrado Malanga, who appears as co-author of Biondi's pyramid research.
Malanga's other publications include books on:
"Alien Abductions"
"Transdimensional Parasites"
"Soul-Mapping"
This does not automatically disqualify Biondi's research, but it is a warning sign. Serious scientists choose their co-authors carefully.
The Honest Assessment
The pattern is familiar and suspicious:
Extraordinary claims (600m deep structures)
Missing peer-review (core claims never in scientific journal)
Presentation in popular media (press conference, podcast)
Controversial associations (co-author with questionable background)
Simultaneously:
Biondi is no layperson (genuine qualifications, genuine publications)
The claims are not refuted (only physically questionable)
Unknown structures exist beneath Giza (other studies confirmed hollow spaces)
The Resonance Calculation
Let's assume for a moment that the 80-meter chambers exist. What would that mean?
Acoustic fundamental resonance of an 80m chamber:
f = Sound Speed / (2 x Length)
f = 343 m/s / (2 x 80 m)
f = 2.14 Hz
The harmonics:
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Harmonic
Frequency
Brain Wave Range
Fundamental
2.14 Hz
Delta (0.5-4 Hz) - Deep Sleep
1st Harmonic
4.3 Hz
Theta (4-8 Hz) - Meditation
2nd Harmonic
6.4 Hz
Theta
3rd Harmonic
8.5 Hz
Near Schumann (7.83 Hz)
Interactive Resonance Calculation - Move the slider to simulate different chamber sizes
What We Need
To confirm or refute Biondi's claims, we would need:
Peer-review of his SAR methodology by independent experts
Replication by other teams with different instruments
Physical confirmation through drilling or other on-site measurements
Transparency about the Gran Sasso validation
Until then, the status remains: SPECULATIVE - Extraordinary claims that require extraordinary evidence, which so far have not been provided.
A machine made of stone, powered by the Earth itself. And the question of why it stopped working.
Whether Biondi's chambers exist or not - the question remains: How would underground hollow spaces, piezoelectricity, and sound waves interact? In the final subchapter of this chapter we connect the pieces into a hypothetical system: the resonance network.
Biondi's claims are extraordinary. Extraordinary claims require extraordinary evidence. So far they are lacking. But if the 80-meter chambers exist, they would have a resonance frequency of exactly 2.14 Hz - in the Delta wave range of the human brain.