“Extraordinary claims require extraordinary evidence,” Carl Sagan once warned a maxim now resonating through telescopes worldwide as astronomers grapple with a mind-bending new discovery. The James ...

The vast majority of matter is dark – invisible until it is detected only through its gravitational effects. The newly discovered object could be a clump of dark matter, or it could also be a compact, ...

Dark matter is believed to make up more than 80 percent of all matter in the universe, but what it actually is remains a mystery. Now, astronomers have found something that gives us a major clue. This ...