Studies prove almost unanimously that the universe is, indeed, expanding. However, different measurements of the rate by which it expands consistently yield different results. Could this mean we need new physics to understand what's going on?
Astronomers have used NASA's Hubble Space Telescope to make the most precise measurements of the expansion rate of the universe since it was first calculated nearly a century ago. Intriguingly, the results are forcing astronomers to consider that they may be seeing evidence of something unexpected at work in the universe.