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China and the U.S. account for more than a third of greenhouse gases — making it vital that any broad climate plans include the pair.

Rejecting the state's argument that it, not the U.S. government, has the authority to define marriage, a federal judge overturned South Carolina's ban on same-sex marriage Wednesday.

Hipsters in Beirut have a problem. Their long, lustrous beards are getting them mistaken for Islamist extremists and drawing unwanted scrutiny from the security forces.

An NPR investigation found thousands of American mine owners fail to pay penalties for safety violations, even as they continue to manage dangerous — and sometimes deadly — operations.

The SmartMat is an intelligent yoga mat that records the user's movements and makes adjustments to improve yoga practice. The creators have a prototype and plan to ship the final product in July.

The northern U.S. is getting a blast of unseasonably cold weather, thanks to what has been dubbed a "bomb cyclone." The Washington Post's Jason Samenow explains that and other odd weather terms.

The newly elected members of Congress arrived in Washington today to begin orientation for their new jobs.

Six banks, including Citigroup, Bank of America and J.P. Morgan Chase, will pay regulators more than $4 billion to settle charges they manipulated the currency exchange market to boost profits.

The European Space Agency on Wednesday successfully landed a probe on the surface of a comet — something that has never been done before. But scientists say the lander may not be fully secure.

For toddlers, the risk is in taking a fall. Teenagers need to worry about car accidents, sports injuries and assault. Knowing how risks change can help prevent fatal or disabling brain injuries.