The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...

The universe is made up of three components: normal or visible matter (5%), dark matter (27%), and dark energy (68%). NASA's Goddard Space Flight Center From stars and galaxies to the shoes on your ...

Everything we see around us, from the ground beneath our feet to the most remote galaxies, is made of matter. For scientists, that has long posed a problem: According to physicists’ best current ...