A mysterious force called Dark Energy might be changing, in a way that challenges our current understanding of the nature of ...

The universe doesn’t revolve around Kitt Peak, but the observatory southwest of Tucson is at the center of what could be the biggest breakthrough in the study of the cosmos in decades. Using an ...

For years, one of the most intriguing mysteries in physics has been dark matter—an invisible substance thought to make up ...

Pushing to regulate artificial light use is one of several suggestions in a new report from the state’s Dark Night Skies Protection Advisory Committee.

Copper is an important mineral that most people get enough of from food. Some foods can even meet all or more of the daily recommended amount with just one serving.

Climate legislation requiring Michigan to get all its electricity from renewable sources became Gretchen Whitmer’s signature ...

More than 1,000 people have already responded to a survey from the Colorado Public Utilities Commission following this week's ...

I usually write this column at home. That was impossible this time, since I was one of the lucky 110,000 households without ...

By studying tiny distortions in the shapes of distant galaxies, scientists mapped dark matter and dark energy across one of the largest sky surveys ever assembled. Their results back the standard ...

Gov. Jared Polis called out Xcel Energy Friday afternoon, saying the utility had to do a better job at communicating how long its outages would last. The statement comes at the end of a week of severe ...

The work to begin restoring power after another Xcel Energy outage could be delayed until as late as 10 p.m. Friday, officials said. The latest forecasts show extreme fire weather conditions, ...

As thousands of Xcel customers prepare to lose electricity through the weekend, Boulder business owners want to know why ...