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dark energy

Physics

Dark Energy Tested on a Tabletop

March 31, 2015

Is dark energy a cosmic chameleon that can fade into its surroundings? A recent test brings the mysterious anti-gravitational force down to earth.

Blanco telescope.
Q&A

Finding Dark Energy in the Details

September 18, 2014

The astrophysicist Joshua Frieman seeks to pinpoint the mysterious substance driving the accelerating expansion of the universe.