Stars and galaxies make up much of the universe's ordinary, observable matter. But for decades, scientists have wrestled with ...

According to current understanding, the universe is expanding—and is doing so at an accelerating rate. This is believed to be ...

Although ordinary matter makes up only a fraction of the cosmos, we don't even know its full extent. Now there's a new clue.

Stars and galaxies make up much of the universe’s ordinary, observable matter. But for decades, scientists have wrestled with ...

A new study proposes dark matter resides in a hidden extra dimension. This hidden dimension may naturally align particle ...

Dark matter is essentially the glue holding the universe together, according to Nicole Gugliucci, physics professor at St.

The Big Bang may not mark the absolute beginning of everything. A controversial cosmological model instead treats it as a ...

Scientists from the Massachusetts Institute of Technology have developed a new method of searching for the missing ordinary ...

The Big Bang may not mark the absolute beginning of everything. A controversial cosmological model instead treats it as a boundary, with our universe on one side and a time-reversed anti-universe on ...

Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously large black holes” might be used by alien civilisations, and what makes the ...

Modern cosmology rests on a simple assumption: if we look on large enough scales, matter should be distributed evenly, with no preferred direction within the cosmos. This is known as the cosmological ...

A feeding black hole at the heart of a nearby galaxy is behaving similarly to cosmic titans that existed just after the Big ...