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Renewable energy is taking off across the nation, but storing the energy is still a problem that is challenging companies to innovate, with solutions ranging from molten salt to ice.

NPR examined what the president-elect has said about the 10 issues voters care most about.

New technology, new safety measures, and a new relationship with Cuba are what reporter Jesse Sanchez says will be the big stories in baseball this year.

Nationally, the economic toll of the opioid crisis is in the hundreds of billions of dollars. For families of addicts, the losses can include their life savings, peace of mind and a sense of hope.

A young man averted disaster after a friend took him to the nearest hospital just before his appendix burst. But more than a year later, he's still facing a huge bill for his out-of-network surgery.

Our annual roundup of the top viral teaching/learning moments from around the country on Twitter, Instagram and TikTok.

The president told reporters on Friday that he's being treated "very unfairly" and that what House Speaker Nancy Pelosi calls impeachment isn't real until the full chamber casts a vote.

The opening statement from the former FBI director confirms many of the bombshell reports that have raised questions about whether President Trump tried to interfere in the Russia investigation.

A developmental framework for building 21st century skills — no technology or money required.

Some villagers considered it improper for girls to go to school. Now, after surviving the reign of ISIS, young Yazidi women in Iraq's Kurdistan region are getting an education.