Signal hints at possible interactions between ordinary hydrogen and dark matter in the early universe, but some scientists remain skeptical.
About 100 years ago Henrietta Swan Leavitt helped prove the existence of other galaxies. She is still inspiring astronomers today (infographic).
New simulations suggests life could exist in universes very different from our own.
A team of scientists develop a model that describes the accelerating expansion of the universe without the need for mysterious dark energy.
"Deep learning" finds telltale arcs of light that indicate massive objects.