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When scientists got their hands on a collection of the world's biggest gem diamonds, they found something surprising inside — clues about what sits hundreds of miles beneath our feet.

NASA engineers are trying to figure out why a part of the rover's robotic arm keeps stalling just as it's about to drill into Martian rock.

Security forces descended on the country's election commission headquarters, ratcheting up tension in the country as regional leaders arrive to try and persuade the current president to quit power.

Millions of years ago, a dinosaur about the size of a sparrow had a bad day. It got stuck in resin. Paleontologists recently came across the rare amber fossil containing its tail in Myanmar.

Years after Pearl Harbor and decades before a proposed "Muslim registry," Sammy Lee tried to "prove that in America, I could do anything." America hasn't always been convinced.

Belle Benchley, the first female zoo director and Bertha Pendleton, the first woman and first African American San Diego school superintendent, are among the 28 women whose stories are told.

A day after the Army Corps of Engineers blocked the proposed route for the Dakota Access Pipeline, the tribal leader said "nothing will happen" until the Trump administration begins.

Protesters who celebrated a major victory in their push to reroute the Dakota Access oil pipeline vowed to remain camped on federal land as they wait to find out whether President-elect Donald Trump might seek to overturn a decision that delayed the $3.8 billion project.

Each year, millions of Americans leave jail and prison. When they do, they're likely to have a hard time managing their health. Some clinics are trying to provide ex-inmates with better, cheaper care.

Searching for alien life is harder than you might think, because whatever is out there might be really odd. So leading astrobiologists are meeting to advise NASA on how to go about looking for it.