A new experiment in Italy will seek an unlikely particle that some scientists think could unlock the "dark sector" of our universe.
Roughly 80 percent of the mass of the universe appears to be dark matter: an invisible material that seems to interact with ordinary matter only through gravity, without emitting light or energy. Scientists cannot detect dark matter directly and don't yet know what it's made of, but they track its influence based on the motions of stars and galaxies. The presence of dark matter is necessary to explain the universe's current structure.
A new study validates Einstein's theory of general relativity in a distant galaxy for the first time.
Does dark matter have an electric charge? No one's really wondered before, but researchers are exploring the possibility that some dark matter particles have a small electrical charge.
Physicists speculate that decaying neutrons may be producing particles unknown to science that make up the elusive dark matter.
A measurement of the fine structure constant puts significant limitations on the existence of these dark partners to ordinary light particles.
Dark matter may actually be a scattering of primordial black holes that arose soon after the Big Bang as a result of instabilities in the Higgs field, according to a new theory.
Scientists have calculated an end date for the universe. Presuming there are no surprises, of course.
Mysterious cosmic signals radiating from the center of our Milky Way galaxy are actually triggered by ancient stars, rather than dark matter, a new study shows.
Stars were lighting up the universe by just 180 million years after the Big Bang, a new study reports.