A mathematical investigation of galactic data suggests elusive dark matter is confined to the rules of gravity.

New research suggests dark matter behaves like normal matter under gravity but leaves room for a weak, unknown force.

Scientists have discovered that dark matter, the universe's most mysterious "stuff," obeys gravity on vast cosmological scales. This could help to dismiss the possibility of a fifth fundamental force ...

For years, dark matter has puzzled scientists, lurking in the universe’s vast expanse yet eluding direct detection. This ...

On Episode 184 of This Week In Space, Rod Pyle and Tariq Malik look at why space can be scary with a survey of some of the best (and some of the most laughable) movies about critters from outer space!

'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than ...

The early growth of the gas giant carved rings that formed primitive meteorites and shaped the architecture of the inner ...