David Kestenbaum

David Kestenbaum is a correspondent for NPR, covering science, energy issues and, most recently, the global economy for NPR's multimedia project Planet Money. David has been a science correspondent for NPR since 1999. He came to journalism the usual way — by getting a Ph.D. in physics first.

In his years at NPR, David has covered science's discoveries and its darker side, including the Northeast blackout, the anthrax attacks and the collapse of the New Orleans levees. He has also reported on energy issues, particularly nuclear and climate change.

David has won awards from the American Association for the Advancement of Science, the American Physical Society and the Institute of Electrical and Electronics Engineers.

David worked briefly on the show This American Life, and set up a radio journalism program in Cambodia on a Fulbright fellowship. He also teaches a journalism class at Johns Hopkins University.

David holds a bachelor's of science degree in physics from Yale University and a doctorate in physics from Harvard University.

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5:08pm

Thu June 5, 2014
Planet Money

Why A Pack Of Peanut Butter M&M's Weighs A Tiny Bit Less Than A Regular Pack

Originally published on Wed June 25, 2014 4:03 pm

Peanut Butter M&M's are larger and more irregular than standard M&M's.
Quoctrung Bui/NPR

The other day I went down to the little shop in the lobby of our building for a snack. I couldn't decide whether I wanted regular M&M's or Peanut Butter M&M's so I bought them both. On the way back upstairs to the office, I noticed something strange on the labels. Each had cost $1, but the pack of Peanut Butter M&M's was a very tiny bit lighter: 0.06 ounces lighter!

I wanted to know why, so I called a couple of experts and asked for their theories:

Theory No. 1: Peanut Butter M&M's are more expensive to make.

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1:42pm

Fri May 16, 2014
Planet Money

Is A Stradivarius Just A Violin?

Originally published on Fri May 16, 2014 7:00 pm

A Stradivarius violin at the restoration and research laboratory of the Musee de la Musique, Paris, in 2009.
Patrick Kovarik AFP/Getty Images

The Stradivarius violin gets its name from master craftsman Antonio Stradivari. When he died in 1737, his secrets died with him: No one has ever been able to duplicate the sound of the violins or violas he made.

His instruments have taken on a mythical quality. Today they fetch millions of dollars at auctions; Sotheby's will soon auction off a viola that it expects to sell for $45 million.

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3:44pm

Fri May 2, 2014
Economy

In 4,000 Years, One Thing Hasn't Changed: It Takes Time To Buy Light

Originally published on Sat May 3, 2014 10:17 am

Transcript

AUDIE CORNISH, HOST:

And now, 4,000 years of economic growth in seven minutes. This story comes, of course, from our Planet Money team. David Kestenbaum and Jacob Goldstein bring us the history of light and how the world came what it is today.

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3:37pm

Thu April 24, 2014
Health Care

How One State Convinced Its 'Young Invincibles' To Get Health Insurance

Originally published on Fri April 25, 2014 11:45 am

A 2008 ad trying to convince uninsured Massachusetts residents to get signed up for health insurance.
Sawyer Miller Advertising

Buying insurance doesn't always feel like it makes economic sense, especially for young healthy people. So why are they still willing to pay?

Copyright 2014 NPR. To see more, visit http://www.npr.org/.

Transcript

AUDIE CORNISH, HOST:

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4:41pm

Thu March 6, 2014
Planet Money

Does Raising The Minimum Wage Kill Jobs?

Originally published on Thu March 6, 2014 6:50 pm

Kenzo Tribouillard AFP/Getty Images

President Obama has called for increasing the minimum wage, saying it will help some of the poorest Americans. Opponents argue that a higher minimum wage will lead employers to cut jobs.

Figuring out the effect of raising the minimum wage is tough. Ideally you'd like to compare one universe where the minimum was raised against an alternate universe where it remained fixed.

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