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The rolling NASA laboratory called Curiosity has begun its two-year mission on the Red Planet. The nuclear-powered robot pulled off a tricky touchdown in a Martian crater. There is a lot riding on this mission — not the least is the $2.5 billion price tag.

Low-glycemic foods that take awhile to digest may help keep weight off longer than other diets. The low-glycemic diet comes out on top in a new study that compared to the low-carb diet and the low fat diet.

President Obama was in Iowa Tuesday, touting the electric potential of wind power. Republican rival Mitt Romney was in Ohio, talking up coal. Each candidate accused the other of standing in the way of the rival energy source.

Firefighters are battling a huge wildfire at Yosemite National Park in California. Only 7 percent of the fire has been contained. Thousands of firefighters are pitted against it, with more on the way. Thousands of residents have been evacuated.

Now that Fright Night is the most popular holiday, it has nowhere to go but down.

A new report backed by the State Department found a 10 percent jump in students coming to the U.S. for higher education.

Republican presidential candidate Ben Carson says he never applied to West Point, although in his book, he had written that he was "offered a full scholarship" to the elite military academy.

The prevalence of smoking and other major cancer risk factors varies widely by state. So does the uptake for preventive screening tests.

At President Obama's direction, U.S. forces based out of Iraq conducted a raid in eastern Syria. NPR's Scott Simon talks with correspondent Tom Bowman about the operation.

As she leaves the Fed's top job, Janet Yellen gets high marks for the way she resisted calls to raise interest rates as the economy began recovering. Instead, she was determined to boost job growth.