Scientists Think Dark Energy May Be Changing Over Time

Dark energy — the mysterious force accelerating the expansion of the universe — may not be constant after all. New observations, including the growing “Hubble tension,” suggest the cosmos could be evolving in ways current physics cannot fully explain. Scientists are now exploring radical ideas involving quantum fluctuations, modified gravity, and dynamic spacetime itself. The answer could determine the ultimate fate of the universe, from an endless frozen expansion to a catastrophic Big Rip. This episode includes AI-generated content.