Then, after another 100,000 years or so, the new field simply winked off, leaving no trace other than a speeded-up universe. Long, long ago, when the universe was only about 100,000 years old — a ...

Add Yahoo as a preferred source to see more of our stories on Google. In space, there are four dimensions: length, width, height and time. scaliger/iStock/NASA via Getty Images Plus About a century ...

Add Yahoo as a preferred source to see more of our stories on Google. A new study challenges the idea of an ever-expanding universe. (CREDIT: CC BY-SA 4.0) Astrophysicists have presumed for nearly a ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. About a century ago, scientists were struggling to ...

In the depths of the universe, where black holes collide and neutron stars crash, invisible ripples in spacetime are sent ...

The Big Bang theory has dominated our understanding of the universe’s origin for almost 100 years. It describes a moment when all of space, time, and energy were born from a single infinitely dense ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.

There was, you might say, a disturbance in the Force. Long, long ago, when the universe was only about 100,000 years old — a buzzing, expanding mass of particles and radiation — a strange new energy ...