David Kestenbaum David Kestenbaum is a science correspondent for NPR. His job allows him to combine his extensive background in physics with his love of broadcast journalism.

Students show off the results of their trades. Caitlin Kenney/NPR hide caption

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Caitlin Kenney/NPR

Why Economists Hate Presents, And How 7th-Graders Solved The Problem

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Hard to make. Kevin H./Flickr hide caption

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Kevin H./Flickr

After The Crisis, An Economist Reconsiders Cappuccino

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What Should The Government Pay For? Autopsies And Lighthouses!

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Scott Fitzpatrick, with stone money. courtesy Scott Fitzpatrick hide caption

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courtesy Scott Fitzpatrick

The Island Of Stone Money

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Sanat Kumar, with table. David Kestenbaum/NPR hide caption

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A Chemist Explains Why Gold Beat Out Lithium, Osmium, Einsteinium ...

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We Bought Gold!

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The last bubble: A neighborhood laid out in in the 1970s in Charlotte County, Florida, for a subdivision that never got built. DigitalGlobe hide caption

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DigitalGlobe

Before Toxie Was Toxic

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Caged prisoners below deck on a transport ship bound for Australia. Hulton Archive/Getty Images hide caption

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Hulton Archive/Getty Images

Pop Quiz: How Do You Stop Sea Captains From Killing Their Passengers?

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Study: Cash For Clunkers Was A Wash

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Julie Remache and Nathaniel Wuerffel, in front of the trading room. That's the table-tennis trophy in the background. David Kestenbaum/NPR hide caption

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David Kestenbaum/NPR

How To Spend $1.25 Trillion

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