Astronomers are closing in on a result so statistically secure that, in their language, it borders on certainty: a 99.9999999 ...

If there is an absolute law in the universe, it’s that nothing can travel faster than the speed of light. For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of ...

For much of the twentieth century, scientists expected the expanding universe to slow over time. The opposite turned out to be true.

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The universe's expansion may actually have started to slow rather than accelerating at an ever-increasing rate as previously thought, a new study suggests. "Remarkable" findings published today in ...