“Dark energy” is a term scientists use to refer to whatever is causing the universe to expand faster over time. We don’t know exactly what dark energy is—no one has ever directly seen or measured ...

and a force that repels gravity known as dark energy (70 percent). Scientists have not yet observed dark matter directly. It doesn't interact with baryonic matter and it's completely invisible to ...

CHRISTCHURCH, New Zealand — Dark energy has been modern physics’ most successful placeholder, a theoretical force invented to explain why galaxies seem to be racing away from each other at ...