A new study sees evidence of more than a dozen galaxies that seem to lack dark matter and raises big questions about our ideas of galaxy formation.

We might know that dark matter is everywhere, but we know very little about it. So, what do we understand about this mysterious but critical component of the universe?

When you think about just how much dark matter there is in the universe, it would be pretty strange if it never harmed anyone or anything…

Galaxies seemingly lacking dark matter which threatened to rule out alternative ideas about what dark matter could be may actually be full of it, according to a second, in depth look.

Are two galaxies which seem to lack dark matter proof that dark matter must be a particle rather than a quirk of gravity at cosmic scales. Well, it's actually kind of complicated...

Theoretical physicists seem ready to move on from looking at dark matter as unknown particles we've yet to discover, and consider it a side-effect of gravity at cosmic scales.

It turns out that one of the best ways to learn about dark matter is to turn out the lights, lean back, and closely watch a little gravitational galaxy on galaxy action.

Two astronomers think they found evidence in the Cosmic Microwave Background Radiation that the amount of dark matter in the universe is far smaller than currently thought.

The survey which figured out the right way to view the remaining visible universe has been misconstrued to mean we no longer need to investigate dark matter.

Add another bizarre, universe-defining darkness to your list.