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Dozens of games and apps claim to improve your memory or make you smarter or reduce stress. But do they really? Developers say the next step is clinically valid proof of cognitive gains.

California is trying to do just that, though police and advocates for ex-offenders are at odds over whether it will work. The debate is playing out as President Obama is calling for nationwide change.

The latest session made history on several fronts, and accepted cases for next year that will likely make still more. This year the liberals won a lot — but that doesn't mean they will in the future.

Justin Timberlake rocketed to stardom as a teen heartthrob in the band 'N Sync. He has gone on to be a successful solo artist — and expanded his career into both comedic and dramatic roles on-screen. He discusses his long career in showbiz, his SNL digital shorts and his transition to film.

There are an estimated 20 million to 30 million surveillance cameras in China — or about one for every 43 people. Officials say the cameras help fight crime and maintain "social stability." But critics say the government uses them to monitor and intimidate dissidents.

Bloomberg set off something of a firestorm with a poll that found President Obama leading Mitt Romney by 13 points, when most polls show the race much tighter. Now, the pollster is offering a point-by-point explanation.

The December 2004 Asian tsunami left nearly a quarter of a million people dead. Indonesia's Aceh province was among the hardest hit. But nine years on, the province is home to a largely successful reconstruction effort, a peace deal between separatists and the government, and economic progress.

The Senate Conservatives Fund, founded by then-Sen. Jim DeMint, is a big-money player targeting incumbent Republican senators including Minority Leader Mitch McConnell of Kentucky.

Alan Alda founded The Flame Challenge last year to promote better science communication, and he started by asking scientists to come up with a kid-friendly explanation for a flame. Now, Alda is back with round two of the popular contest, and kids want to know: What is time?

After an influential task force of experts said evidence didn't support some cancer screenings, it became the target of lawmakers, including Rep. Tom Price and others with health industry ties.