Pick the topics you care about. Your homepage shows them first. No account needed.
Get new stories on your phone
A mysterious force thought to be responsible for the accelerating expansion of the universe.
Dark energy makes up a large portion of the total mass-energy of the universe. Its exact nature remains unknown to modern science. It acts in opposition to gravity by pushing galaxies apart.
A radical cosmological model suggests the universe is nearly twice as old as commonly thought and operates without dark matter or dark energy.
Mathematicians at UC Davis argue that cosmic acceleration may stem naturally from Einstein's equations, challenging the need for dark energy.
