Add Yahoo as a preferred source to see more of our stories on Google. The universe is packed with riddles, but few are as stubborn or as fascinating as dark matter. First proposed in 1933 by ...

The universe is mostly a ghost story we don’t understand. Everything we know of, the stars, the planets, and everything on ...

Dark matter is real, according to most experts. However, some scientists still debate if it is real or not, and we do not know much about it. Dark matter is a mysterious and invisible substance that ...

The spacecraft bus that will deliver NASA's Nancy Grace Roman Space Telescope to its orbit and enable it to function once there is now complete after years of construction, installation, and testing.

Physicists have unveiled a new way to simulate a mysterious form of dark matter that can collide with itself but not with normal matter. This self-interacting dark matter may trigger a dramatic ...

Dark matter, one of the Universe’s greatest mysteries, may have been born blazing hot instead of cold and sluggish as scientists long believed. New research shows that dark matter particles could have ...