SpaceGalaxy cluster smash-up lets us observe dark matter on its own Astronomers have spotted two colossal clusters of galaxies colliding and shooting out all of their dark matter, which may provide crucial evidence of how dark matter shapes the cosmos News
SpaceThere are hints that dark energy may be getting weaker The standard model of cosmology says that the strength of dark energy should be constant, but tentative hints are emerging that it may have weakened recently News