Three U.S.-trained scientists won the Nobel prize in physics last week . Meg Urry says their findings documented the impact of `` dark energy '' in expanding universe . She says dark energy is a force much more powerful than gravity . And some day far in the future , understanding how dark energy could be a property of empty space throughout the universe may well have a profound impact on how we live back here on Earth . It pushes galaxies apart and makes them fly apart.
Three U.S.-trained scientists won the Nobel prize in physics last week . Meg Urry says their findings documented the impact of `` dark energy '' in expanding universe . She says dark energy is a force much more powerful than gravity . It pushes galaxies apart and makes them fly apart.