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In October 1962, Nick Holonyak and colleagues at General Electric built the first practical light-emitting diode, or LED, that could emit visible light. Semiconductor LEDs are now a part of uncountable electronic devices. Holonyak discusses the invention, and his work since then.

Rumors about the former Cuban leader's health have swirled on social media for the past day, but Fidel Castro's son says the 86-year-old is just fine, exercising and going on with his everyday activities.

More than a dozen Republican members of Congress—including Kentucky Senator Mitch McConnell-- hope to file a friend-of-the-court brief in Hobby Lobby…

"K-Man," as he's known to locals, lived more than 9,500 years ago in what is now Washington state. Scientists studying his ancient bones say he was all athlete, with a soccer player's leg muscles and a killer arm that might fit right in among today's major league players.

How was the Joe Biden vs. Paul Ryan vice presidential debate like a Major League Baseball playoff game? Well, umpires (and moderators) matter, for one. Here's a list.

United Mine Workers officials suspect the Obama administration doesn't want to move forward on the new rules during the presidential campaign. The federal mine safety chief says the process takes time.

Willow Tufano's life over the past few months was sort of surreal. She got caught up in two dramas: America's housing market and America's media circus. Now she's trying to get her own reality show.

When the Soviet Union collapsed, its vast nuclear stockpile did not appear secure and the U.S. stepped in to help. Thousands of nuclear weapons have been dismantled with U.S. aid over the past two decades. But now Moscow says it's ready to pull the plug on the program.

The first two debates of the 2012 election cycle have had stratospheric viewership on TV.

Publicist-turned-filmmaker Ava DuVernay's Middle of Nowhere follows an inmate's wife's struggle to start over. It's part of a larger, indie film movement that aims to expand the audience for black cinema by telling stories that are "emotionally resonant [to] all."