A new study suggests that the Universe may be rotating -- just imperceptibly slowly. If true, this new finding could help solve one of astronomy’s biggest puzzles -- the “Hubble Tension.” Current models say the Universe expands evenly in all directions, with no sign of rotation. This idea fits most of what astronomers observe. But it doesn’t explain the so-called Hubble Tension, a long-standing disagreement between two ways of measuring how fast the Universe is expanding. To try and reconcile this difference, researchers at the University of Hawaiʻi developed a mathematical model of the Universe and followed the standard rules. Nothing unexpected was uncovered. Then they decided to add a tiny amount of rotation. That small change made a big difference.