For more than a century, Albert Einstein’s theory of General Relativity has been our best description of gravity. It explains how planets orbit stars, how galaxies move through space, and even how black holes warp the fabric of the universe. Yet despite its extraordinary success, some of the biggest mysteries in modern physics remain unsolved. Scientists still do not know the true nature of dark matter and dark energy, the invisible ingredients believed to make up most of the cosmos.
Because of these unanswered questions, researchers around the world continue searching for new ways to understand gravity. One intriguing contribution comes from Prof. Roberto Sussman and Dr. Sebastián Nájera of the National Autonomous University of Mexico, who have proposed a new gravity theory they denote as “Schouten–Codazzi Gravity”. Their work explores whether gravity might be described by a modified set of mathematical rules that remain closely connected to Einstein’s theory while opening the door to new possibilities.

So far, most attempts to model dark matter have relied on assumptions that may not capture its full behaviour, potentially undermining the constraints that astronomers thought they had already established. For the first time, Dr Tomislav Prokopec at Utrecht University, together with his former master’s student Marco Vecchioni, have developed a framework that treats dark matter as a fully quantum field – building on earlier work showing that gravitational waves in the early universe are similarly unaffected by their quantum surroundings. Their findings suggest that several widely-assumed constraints on dark matter may need to be fundamentally reconsidered.