Scientists may have finally found the universe’s missing matter - hidden in invisible hydrogen gas far beyond galaxies.

A never-before-seen image of the cosmic microwave background, combining data from the Atacama Cosmology Telescope (ACT) and ...

For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s ...

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...

In this model, dark matter and dark energy are crucial to explaining the structure of the universe on the largest scales. But the model also has to account for the cosmic microwave background and ...

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

James is a published author with four pop-history and science books to his name. He specializes in history, strange science, ...

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

A new study suggests the universe might be slowly rotating, completing a full revolution every 500 billion years. This subtle ...

An international team of astronomers has solved one of the longstanding cosmic mysteries by uncovering direct evidence of a ...

A new analysis of the sky has finally confirmed where the missing half of the Universe's visible matter has been hiding.