For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...

If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

The universe is approaching the midpoint of its 33-billion-year lifespan, a Cornell physicist calculates with new data from ...

Mathematical quirks of our universe have led some cosmologists to wonder whether the cosmos was actually born in a black hole ...

A recent paper has proposed a new idea for what is causing the observed accelerated expansion of the universe, and dark matter, suggesting both of them may a "cosmic illusion" caused by the changing ...

A backward, mirror universe could explain the existence of dark matter. If an anti-universe exists, it would run backward in time, before the Big Bang. Dark matter, then, could be right-handed ...

In a stunning new twist to the story of our cosmos, scientists say the universe may not expand forever. Instead, it could collapse in a "big crunch" — and they've even estimated when it might happen.

Astronomers have long thought the universe should look generally the same in every direction, but an anomaly in the radiation ...

Information could become the fifth state of matter alongside gas, plasma, liquid, and solid states. A scientist has proposed ...

Most cosmologists believe that these stars were the first large, free-floating structures to illuminate our universe, and ...

About a century ago, scientists were struggling to reconcile what seemed a contradiction in Albert Einstein’s theory of general relativity. Published in 1915, and already widely accepted worldwide by ...

Here’s what you’ll learn when you read this story: A backward, mirror universe could explain the existence of dark matter. If an anti-universe exists, it would run backward in time, before the Big ...