University of Botswana physicists confirm quantum-gravity predictions for supermassive black holes

What is the Nexus Paradigm and how does it differ from classical general relativity?

The Nexus Paradigm treats spacetime as composed of discrete units rather than a smooth continuum. Under this premise the event horizon and surrounding photon ring of a supermassive black hole acquire definite characteristic sizes that can be calculated in advance. Classical general relativity permits a broader range of possible sizes. The theory was constructed at the University of Botswana over nearly twenty years by physicist Stuart Marongwe. Co-authors Moletlanyi Tshipa of the same department and Christian Corda of SUNY Polytechnic Institute translated the premise into explicit numerical predictions for two well-observed black holes. Marongwe has spent years arguing that spacetime is quantised, built from discrete units like matter is built from atoms. This leads to specific calculable sizes for black hole structures instead of a free-floating range. The paper’s co-author Christian Corda contributed from the Department of Mathematics and Physics at SUNY Polytechnic Institute. Dr Marongwe described the outcome as releasing a set of new knowledge that fills a gap Einstein left unanswered. The theory behind the claim is known as the Nexus Paradigm. Its architect, physicist Stuart Marongwe of the University of Botswana, has spent years arguing for a strange premise: that spacetime is not the smooth, continuous fabric Einstein pictured, but quantised, built from discrete units, like matter, which is built from atoms rather than an infinitely divisible paste. Under that premise, a black hole’s event horizon and the bright ring of light around it should settle into specific, calculable sizes rather than a free-floating range of possibilities. Working with colleague Tshipa at the University of Botswana and physicist Christian Corda at SUNY Polytechnic Institute in the United States, Marongwe translated that premise into quantifiable figures.

How did telescope data confirm the predicted sizes?

Radio images from the Event Horizon Telescope supplied the observational benchmark. The measured diameters and ring brightness profiles aligned with the calculated values at 99.9972 percent statistical confidence. The match indicates that the quantised-spacetime assumption yields rulers that correspond closely to what is seen. The result does not claim to replace general relativity across all regimes; it shows that one measurable feature lies nearer the quantum-gravity expectation than the classical baseline used for comparison. Dr Marongwe stated that the theory predicted a set of characteristic rulers for structures surrounding these black holes, and the rulers closely match what the telescope observes. The confirmation applies to two supermassive black holes whose exact shapes were predicted in advance by the model developed in Gaborone. For the first time, two physicists working in Botswana have put a number to the answer and handed the world’s astronomers the means to check their work. The theory effectively predicted a set of characteristic rulers for structures surrounding these black holes, and the rulers closely match what the telescope observes.

Why does the result matter for the search for quantum gravity?

Most approaches to unifying gravity with quantum mechanics require particle energies far beyond those reachable by accelerators on Earth. The Nexus Paradigm instead extracts testable signatures from objects already imaged by existing telescopes. If further observations continue to support the predicted rulers, the search for quantum gravity could proceed with current instruments pointed at the largest masses rather than the smallest particles. The authors note that the finding remains compatible with the many successful tests general relativity has passed over the past century. Einstein never finished a unified field theory and died in 1955 without one. Seventy years later, reconciling gravity with the quantum world remains a stubborn problem, yet this result offers numbers that telescopes can check without new high-energy machines. Dr Marongwe argued that if released in the Global North the discovery would receive widespread coverage, yet the work from the University of Botswana has not been similarly acknowledged. What it suggests is more interesting than a winner and a loser: that the search for a theory beyond Einstein’s, the one he spent his final decades pursuing and never found, may not require new machines at all. It may already be visible in telescopes that exist today, pointed at the largest objects in the universe rather than at the smallest particles.

What would falsify the Nexus Paradigm predictions?

The authors list several independent checks that could confirm or refute the model. Higher-resolution images from future Event Horizon Telescope campaigns, polarisation measurements of light near the black holes, shorter-wavelength observations and eventual space-based interferometry each offer separate tests. Any systematic deviation from the calculated sizes at these higher precisions would count against the theory. The presence of such clear falsifiability criteria distinguishes the work from approaches that do not yet yield numbers telescopes can examine. The researchers present the result as an opening rather than a conclusion and state plainly what would prove the theory wrong. Sharper images, polarisation data and space-based interferometry are identified as routes that could independently confirm or refute the predictions. The authors are careful to present their result as an opening, not a conclusion, and to state plainly what would falsify the theory. Sharper future images from the Event Horizon Telescope, measurements of the polarisation of light bent around each black hole, observations at shorter wavelengths, and eventually space-based interferometry could each independently confirm or refute the Nexus Paradigm’s predictions. That, the researchers argue, is precisely the point of a theory of quantum gravity that yields numbers a telescope can check, a theory that can be proven wrong, a bar most rivals in the field cannot clear.

How has the discovery been received and what challenges remain?

The result originates from an African institution and has not received the same global media coverage that similar announcements from the Global North typically attract. The authors emphasise that the claim rests on one well-defined observable examined in one manner. Plasma physics, magnetic-field effects and image-reconstruction choices can still influence the numbers, and these factors must be tracked in future analyses. No overthrow of general relativity is asserted; the work instead supplies an opening for further quantitative comparison. Dr Marongwe noted that the bulk of the media has sought to silence or water down the claim, yet it stands as a major discovery confirmed at 99.9972 percent statistical confidence. The authors remain explicit that general relativity has passed more than a century of tests and is not dismantled by this single comparison. None of this means general relativity has been overthrown. It has passed more than a century of tests, from falling apples to orbiting satellites to gravitational waves. Reading a blurred radio image of a black hole involves plasma physics, magnetic fields and reconstruction algorithms that can shift the numbers in either direction. The authors are explicit on this point: what they have shown is that one measurable feature, examined in one way, lies much closer to a quantum-gravity prediction than to the classical one used for comparison, not that Einstein’s century-old framework has been dismantled.

Frequently asked questions

What is the statistical confidence level reported?

The match between Nexus Paradigm predictions and Event Horizon Telescope data reaches 99.9972 percent statistical confidence, according to the published analysis.

Who are the lead researchers?

Stuart Marongwe and Moletlanyi Tshipa of the University of Botswana Physics Department developed the predictions, with co-author Christian Corda of SUNY Polytechnic Institute.

Does the result replace Einstein’s general relativity?

No. The authors state that general relativity continues to pass its established tests; the new work shows that one specific feature aligns more closely with a quantum-gravity calculation than with the classical comparison case.

Where was the theory developed?

The Nexus Paradigm was constructed over nearly two decades at the University of Botswana in Gaborone.

What future observations could test the model further?

Sharper Event Horizon Telescope images, polarisation data, shorter-wavelength measurements and space-based interferometry are listed as independent checks that could confirm or refute the predictions.