A team of mathematicians at the University of California, Davis evaluated the standard Lambda-cold dark matter model using the Einstein-Euler equations. Their findings indicate that conventional Friedmann spacetimes are inherently unstable under large-scale radial disturbances, making them physically improbable under established physics principles. The investigation, which originally examined whether a massive cosmic shockwave drove early cosmic expansion, demonstrates that perturbations during the universe's matter-dominated era expand to produce outward acceleration. Furthermore, corresponding author Blake Temple pointed out that the Copernican principle must be re-evaluated fairly across…
Key points
Accelerating cosmic expansion can be explained using Einstein's original general relativi…: Accelerating cosmic expansion can be explained using Einstein's original general relativity equations rather than invisible dark energy.
Fragility in the standard Lambda-cold dark matter model suggests its solutions may be phy…: Fragility in the standard Lambda-cold dark matter model suggests its solutions may be physically unobservable in the real universe.
The research was supported by the United Kingdom's Engineering and Physical Sciences Rese…: The research was supported by the United Kingdom's Engineering and Physical Sciences Research Council alongside the American Institute of Mathematics.
Sources checked by our analysis pipeline: 1
For almost three decades, dark energy has been the standard explanation for why the universe is expanding at an accelerating rate. Now, a team of mathematicians is challenging this widely accepted theory. The mathematicians at the University of California, Davis, argue that the answer may already lie within Einstein’s own equations and that an invisible form of energy may not be needed at all. The findings are published in the journal
Proceedings of the Royal Society A. The researchers worked with the Einstein-Euler equations, which combine Einstein’s general relativity with the rules that govern how fluids move. They used these tools to test the leading framework for explaining the universe’s evolution since the Big Bang, known as the Lambda-cold dark matter model, and found a weak spot in its very foundation.
Einstein’s equations may explain
Blake Temple, the study’s corresponding author and a professor emeritus of mathematics at UC Davis, offered a simple comparison: a pencil balanced vertically on its tip. “All the forces are in balance when a pencil is standing on end, so it is a ‘solution’ of…
University of Cambridge researchers analyzing remains from Shanidar Cave in Iraqi Kurdistan identified a deadly puncture wound that pierced a lung and shoulder blade. The round shape and downward angle indicate a thrust from a sharpened wooden spear potentially aimed directly at the heart. These findings offer rare archaeological insight into the hazardous social and hunting conditions prehistoric hominins faced tens of thousands of years ago.
Ladakh has undertaken a farming experiment that transformed barren land into a saffron field in 30 days. The agricultural project was initiated by Lieutenant Governor VK Saxena.
Plant Heritage has officially designated Chester Zoo's extensive assemblage of more than 75 distinct orchid species as a National Plant Collection. Horticultural specialists maintain these demanding specimens to safeguard them against destructive mining, illegal extraction, and habitat loss in their native Andean cloud forests. The prestigious status marks the English conservation zoo's sixth recognized collection, emphasizing their active commitment to global botanical preservation.