It’s been no secret that ever since the Big Bang, the universe has been growing larger. Based on how far apart the galaxies are, has allowed scientists to estimate the relative age of the Universe. At the moment, the most commonly accepted expansion rate, puts the universe at approximately 13.8 billion years old. A recent study, however, disputes that.

In April, the Hubble telescope discovered evidence that the universe is expanding 9% faster than we thought. This means that the universe might be a billion or two years younger than expected.

What’s even more puzzling, is that scientists have evidence that some of the oldest stars in our universe are older than 13 billion years, but the universe should be only 12.5 billion years old, based on the new math. So how can stars predate the big bang?

We still have a lot to learn.