How rapidly is the universe expanding? Since Edwin Hubble first discovered in 1929 that galaxies are getting farther apart over time, allowing scientists to trace the evolution of the universe back to ...

A persistent, nagging problem with the expansion speed of the Universe may not require a rewrite of everything we know about physics. New measurements taken using the James Webb Space Telescope ...

No matter how elegant your theory is, experimental data will have the last word. Observations of the retrograde motion of the planets were fundamental to the Copernican revolution, in which the sun ...

Global news media as well as prominent scientists are highlighting the crisis in both physics and cosmology, and predicting a major science revolution. The most important discovery about the universe ...

Most of the universe is missing. Only 5% of it is normal matter, which makes up all the people, planets and stars we can see; the other 95% consists of mysterious dark matter and dark energy.

Let’s say you have a baby. Maybe you really do, maybe you don’t. But Dan Scolnic, a cosmologist at the University of Chicago, does have one, and perhaps that's why a hypothetical baby helps him ...

The crisis in cosmology has actually gotten worse, which means we may be onto something! The good news is also that the crisis in cosmology has actually gotten worse, which means we may be onto ...