Mathematicians propose cosmic expansion explanation without dark energy

A team of mathematicians has proposed that the accelerating expansion of the universe can be explained using Albert Einstein's existing equations without requiring dark energy. As The Times of India reported, researchers at the University of California, Davis, published their findings in the journal Proceedings of the Royal Society A. For nearly three decades, dark energy has served as the conventional theoretical model for this cosmic acceleration. [1]

To reach their conclusions, the mathematicians analyzed the Einstein-Euler equations, which integrate general relativity with fluid dynamics. According to The Times of India, the researchers argued that a more careful mathematical application of these equations reveals that an invisible form of energy may be unnecessary to account for the observed expansion rate. [1]

Einstein frequently developed and explained his physical theories using visual thought experiments. He mentally chased beams of light during his youth, used moving trains to illustrate special relativity, and conceptualized accelerating elevators and falling bodies to construct general relativity. [2]