Early theories proposed that matter began to lump together as the universe cooled, ultimately forming stars and galaxies. But this didn't seem right to some scientists. There hadn't really been ...

The visible universe—including Earth ... from even more distant galaxies is being distorted and magnified by massive, invisible clouds of dark matter in the foreground-a phenomenon known ...

In case dark matter ... of the Universe existed in a singularity, a point of infinite density where spacetime is infinitely curved. But the known laws of physics completely break down there ...