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.

The collapse of the housing market has turned more than $1 trillion in mortgage-backed bonds into toxic assets. Spencer Platt/Getty Images hide caption

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Toxic Assets Market Awaits Rebound

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A computer monitor confirms the purchase of a toxic asset. (Note: Some information is intentionally blurred out.) David Kestenbaum/NPR hide caption

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We Bought A Toxic Asset; You Can Watch It Die

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Decade After Introduction, Euro Struggles

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How Should Medicare Pay Doctors?

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Efficiency experts try to make factories like this run more smoothly. Andreas Rentz/Getty Images hide caption

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Do You Waste Time Walking To The Printer?

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Will Legalizing Pot Solve Calif. Budget Woes?

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Denmark Thrives Despite High Taxes

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