Dark energy may be the most mysterious substance ever proposed, but many scientists are certain it exists. Why?

The Standard Model of our universe doesn’t match the evidence, in part because of dark energy, a ghostly force pushing the ...

This video explains how astronomers studying distant supernovae discovered that the universe’s expansion is accelerating, ...

Nearly everything in the universe is made of mysterious dark matter and dark energy, yet we can’t see either of them directly ...

For a generation, cosmologists have treated dark energy as a fixed backdrop, a steady pressure stretching space faster and ...

Scientists are a step closer to solving one of the universe's biggest mysteries as new research finds evidence that two of ...

Scientists are a step closer to solving one of the universe’s biggest mysteries as new research finds evidence that two of ...

New research puts forward compelling new evidence that dark matter interacts with cosmic "ghost particles" called neutrinos.

Astronomers have revealed a new type of cosmic object called Cloud-9 — a dim, starless gas cloud anchored by a massive dark ...

Exotic hypothetical particles known as axions could potentially be produced inside a nuclear reactor, something The Big Bang ...

A team of scientists has estimated that the Hubble Space Telescope could reenter Earth’s atmosphere and meet its fiery demise ...

Scientists have moved a step closer to solving one of the universe's biggest mysteries, with new research suggesting that dark matter and neutrinos -- two of its least understood components -- may ...