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All kinds of companies were hiring last month. U.S. employers added 243,000 jobs in January, and the unemployment rate fell to 8.3 percent. Experts are cautiously optimistic, but the boost in hiring may give the president extra momentum going into November.

Pop star Lady Gaga has recently been spotted in Lancaster County, Pa. Guest host David Greene looks into the rumors of what she's up to.

Some highly improbable events lately have embarrassed the host states in the presidential nominating process, including Nevada, which held its caucus Saturday night.

The first big fields of stevia ever grown in the U.S. will spout this summer in California's Central Valley. One company is trying to turn this semiwild, zero-calorie plant into an industrial crop at Silicon Valley speed.

The ancient Chinese martial art has been shown to benefit older people by maintaining balance and strength. Now, researchers find Tai Chi can also benefit patients who suffer from Parkinson's, a progressive disorder of the nervous system that affects movement and motor control.

Southern Co. will build the reactors at its Vogtle site in Georgia. An industry-backed group hopes it's the first wave of new reactors, but a coalition of groups plans to sue to stop the project. Among its arguments: Engineers are still figuring out what went wrong at the Fukushima meltdown in Japan last year.

Newt Gingrich was forced to defend his record as House speaker and later as a consultant to mortgage giant Freddie Mac during Monday night's GOP presidential debate in Tampa, Fla. And he said he was the type of bold, tough leader Washington needs. That's the part of his record that appeals to many of his supporters in the Tea Party.

President Obama's critics say he has blocked domestic oil production. But under his administration, a steady uptick in U.S. drilling operations, combined with falling overall consumption, has led to a steep drop in the percentage of oil the U.S. imports. Analysts say by 2035, the U.S. will import a little more than a third of its oil, down from 60 percent in 2005.

The Federal Reserve will announce on Wednesday what officials expect to do with the rates it controls for next couple of years. The Fed will join central banks in Sweden, Norway and New Zealand in relaying information about expectations for short-term interest rates. Renee Montagne talks to David Wessel of The Wall Street Journal about why the Fed is doing this, and the impact it will have.

Astronomers want increasingly large telescopes to peer into the depths of space. To build a solid telescope mirror nearly 30 feet across, you need an oven that heats to 2,100 degrees Fahrenheit and spins around like a top.