The oldest stars in the Milky Way are forcing a fresh look at one of cosmology’s biggest arguments. If some of them are about ...

Physicists are scrambling to understand why dark energy is weakening. In a surprising twist, we must now reconsider the ...

The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out dozens of models that attempted to solve it. Reading time 3 minutes The ...

For decades, the cosmological field was working under the assumption that, after the universe began in a hot dense soup of energy that expanded in the Big Bang, it continued to expand, forming the ...

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The structure is so large, it defies one of the simplest rules of cosmology. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

How do you measure dark matter, which by definition emits no light? Watch how it impacts things that you can see — specifically, how light from distant galaxies bends around it, as predicted by ...