This segment was originally broadcast on Jan. 28, 2013.

Al Roker, the veteran weatherman on NBC's Today show, endured years of indignities as an obese teenager and throughout his television career. Then, in 2002, he had bariatric surgery and lost more than 100 pounds. But deciding to have the procedure, which is potentially life-threatening, wasn't easy — and neither was keeping the weight off afterward.

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MICHEL MARTIN, HOST:

This is TELL ME MORE, from NPR News. I'm Michel Martin. It is Presidents Day, a day we celebrate the nation's presidents, and for many people it's a day off: a day to spend time with friends and family.

The president of Kalamazoo College is getting some national attention. Eileen Wilson-Oyelaren has been named chairwoman of the board at the National Association of Independent Colleges and Universities.

She took the position at the group’s annual meeting in Washington last week. The association represents the interests of private non-profit colleges and universities.

People around the world want the same thing from their doctors. First, do no harm. Second, take a look at this weird bump and tell me if I should get worried.

The job is basically the same in many countries around the world. But the pay is wildly different. The median salary for U.S. doctors is about $250,000 a year. In Western Europe, it's less than half that. In developing countries, the salaries are even lower.

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IRA FLATOW, HOST:

This is SCIENCE FRIDAY, I'm Ira Flatow. Early this morning...

(SOUNDBITE OF EXPLOSION)

FLATOW: You heard it, a meteor exploded over Central Russia. It rattled buildings, shattered glass over a wide area, causing hundreds of injuries estimated at 900 or more at this hour. And at this very moment another asteroid, half the size of a football field, is speeding towards our planet. But there's no need to panic. This one is not raining space rocks, say scientists.