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Previous estimates of the climate-warming gas were based on the rough number of methane-emitting sources on the ground — such as factories, refineries, stoves, swamps, landfills and cattle herds. But by directly measuring levels of methane in the air instead, a new study puts the total much higher.

It's rivalry week in college football. And this weekend, there's some extra spice as games from Alabama to Florida to Michigan could have an impact on which two teams end up playing for the national championship.

"When we pull back the curtain now, the mess is disturbing," says House Energy and Commerce Committee Chairman Fred Upton, R-Mich., of the latest revelations. These documents call into question whether contractors can fix the website as promised by the end of November.

Archaeologists are now mapping a wall in eastern China that is as much as 15 feet tall in some places, and predates the more famous barrier by 300 years. Hundreds of miles long, it was likely erected to keep neighboring Chinese dynasties from invading each other, historians say.

A cross-generational group of Afghanistan's top musicians provides a living archive of the nation's cultural treasures — players who've found a new home in Fremont, Calif. They've just released a new album, headed by a phenomenal female singer named Mahwash.

By George Olsenhttp://stream.publicbroadcasting.net/production/mp3/pre/local-pre-928705.mp3Instant Run-off Voting to be used statewide for first time in…

Republicans continue to press the Obama administration for more details on how they would cut billions from the defense budget if sequestration is put into place in January. The Department of Defense will now have to explain why it has not planned for an event that is becoming increasingly likely.

Russia is preparing for the 2014 Winter Games — turning a sleepy valley in the Northern Caucasus Mountains into an Olympic village, with brand-new facilities for every Alpine sport. Officials say it will be a world-class destination for winter-sports enthusiasts long after the Games are over. Environmentalists say it's an ecological disaster in the making.

President Obama is expected to name former Justice Department official James Comey as the next director of the FBI, sources tell NPR. Comey is a Republican who has a reputation for bipartisanship and even-handedness.

One business that flourishes in Pakistan these days is the generator business. Pakistan's chronic power outages are worsening amid stifling summer heat. Incoming Prime Minister Nawaz Sharif says he has a plan but many are skeptical.