A new theory of quantum gravity could explain a huge puzzle in cosmology, the study suggests

A variant of the theory of quantum gravity – unification Quantum Mechanics and Einstein’s General relativity – could help solve one of the biggest puzzles in cosmology, new research suggests.

For nearly a century, scientists have known that the universe is expanding. But in recent decades, physicists have discovered that different types of measurements of the expansion rate — known as the Hubble parameter — have produced puzzling discrepancies.

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