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.

Yen Jingchang was one of the signers of the secret document. Jacob Goldstein/NPR hide caption

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Jacob Goldstein/NPR

The Secret Document That Transformed China

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Demand for quarter, dimes, nickels, and pennies was up this year. AP hide caption

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AP

People Want More Coins, That's A Good Sign For The Economy

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Dollar coins gathering dust in the Fed's Baltimore brach. John W. Poole/NPR hide caption

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John W. Poole/NPR

White House Kills Dollar Coin Program

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Aaron Foster, with cheese. David Kestenbaum/NPR hide caption

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David Kestenbaum/NPR

Why A New York Cheese Buyer Hangs On The Euro's Fate

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NPR

What If We Paid Off The Debt? The Secret Government Report

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Stephen Neary/Connie Li Chan/Robin Arnott

The Return Of Toxie

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What Is Bitcoin?

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Why the long bridge? Stuart Ramson/AP hide caption

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Stuart Ramson/AP

A Big Bridge In The Wrong Place

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Legislation Aimed At Killing Dollar Coin Program

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Spaceflight Is Getting Cheaper. But It's Still Not Cheap Enough.

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Jane Liaw Liaw orders coins from the U.S. Mint to earn frequent-flier miles. Jane Liaw hide caption

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Jane Liaw

How Frequent Fliers Exploit A Government Program To Get Free Trips

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