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DNA's instructions are written in a code of four molecular "letters," labeled A, C, T and G. For the first time, researchers have created and inserted two brand-new letters into a living cell.

When the SS Central America sunk in 1857, it took down tons of gold with it. Gary Kinder, author of Ship of Gold in the Deep Blue Sea, tells the fraught tale of shipwreck and recovered treasure.

It's the end of an era, as Johnson Publishing Co. announced plans to cease printing Jet. The magazine, which started some 63 years ago, was long a staple for many African-Americans.

Though she's been a popular singer since the '80s, Natalie Merchant has often worn the air of one who finds pop stardom distasteful. On her new self-titled LP, she dredges that tension to the fore.

Stanford says it will its divest holdings in coal companies over climate change concerns. It's the most prominent of the roughly one dozen colleges that have decided to sell off fossil fuel holdings.

Vermont gets ready to become the first state to require food producers to label products that are genetically modified, but not without preparing for major legal battles with companies like Monsanto.

Most of the country became aware of issues with the state's capital punishment protocols last week after Clayton Lockett's bungled execution, but his lawyers had been worried for months.

On a largely party-line vote, Republicans and some Democrats approved the establishment of a committee to dig deeper into the Sept. 11, 2012, attack on a U.S. diplomatic mission in Libya.

Raising money after tragedy isn't new. But the latest dust-up comes as both parties try to energize their grass-roots supporters with control of Capitol Hill in the balance.

Most people with hoarding disorder are older, but researchers say teenagers can have many of the symptoms. The fact that they haven't had enough time to accumulate stuff may mask the problem.