Ancient Milky Way stars challenge the age of the universe and the Hubble tension
The oldest stars in the Milky Way are forcing a fresh look at one of cosmology’s biggest arguments.…
Scientists develop a new way to measure the expansion rate of the universe
For years, cosmologists have argued over a simple question with an awkward answer: How fast is the universe…
A cosmic anomaly suggests we need to rethink the shape of our universe
In recent years, Nobel Prize–winning physicist James Peebles, one of the main architects of the standard cosmological model,…