A backward, mirror universe could explain the existence of dark matter. If an anti-universe exists, it would run backward in ...

The shape of the universe has been puzzling scientists for decades, and some new theories suggest it might not be […] ...

Modern cosmology has precisely measured the universe's properties, yet dark matter and dark energy remain profound mysteries. While dark matter's gravitational effects are evident, its composition is ...

Astronomers at Leiden University have detected rare isotopes of carbon and oxygen in our neighboring stars for the first time ...

While there's no shortage of mysteries surrounding the formation of the universe, scientists may have figured out the answer ...

The universe seems to be spinning, and that could explain what dark energy is and why it's weakening while revealing our place within the multiverse.

A monster galaxy from the early universe shows that the cosmos was rich with oxygen when it was only less than 3% of its ...

Fast radio bursts (FRBs) last around a millisecond and in doing so encode otherwise unattainable information on the plasma ...

It seems our universe started very small and has been expanding ever since. In fact, scientists now know that not only is the universe expanding, but the speed at which it’s expanding is increasing.

Mathematical evidence indicates that our universe is flat, but it could be infinitely big, as well. You can figure out if an object is flat with a simple pencil-and-paper geometry exercise.

Astronomers have discovered the most monstrous supermassive black hole ever. At 36 billion times more mass than our sun, it’s so big it’s pushing back the boundaries of possibility. They’ve even had ...