To understand the cosmos we rely on models, and these models are constantly being refined using new observations and theories. Over the last few years, it has become clear that the way we see the universe, the Standard Model of Cosmology, is no longer matching up with observations, creating a complex yet fascinating problem.
The issue boils down to a single parameter known as the Hubble Constant. This gives us the value of the expansion rate of the universe. But it seems that it is not constant at all. The value we get from measurements from the early universe doesn’t match what is seen in the modern universe.
A new paper ... Read even more
