Ancient supernovae show that mysterious force existed early in Universe.

Astronomers have determined that dark energy, a force that counters gravity, existed at least 9 billion years ago. And the mysterious force seems to have been much the same then, in the infancy of our 13.7-billion-year-old Universe, as it is today.

Read the story here.

Ancient supernovae show that mysterious force existed early in Universe.

Astronomers have determined that dark energy, a force that counters gravity, existed at least 9 billion years ago. And the mysterious force seems to have been much the same then, in the infancy of our 13.7-billion-year-old Universe, as it is today.

Read the story here.