Scientists have peered into the early days of the universe, when it was about 1 billion years old, and discovered that things moved in slow motion compared with now.The finding supports Albert ...

In a first, astronomers have observed time ticking in slow motion in the early cosmos, confirming Albert Einstein’s century-old ideas about the reality-warping effects of our universe’s expansion. By ...

Ever since Astronomer Edwin Hubble discovered in 1928 that the great galaxies, thinly scattered through space, are fleeing from one another, scientists have tried to explain the expanding universe, or ...

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 ...