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.

Just about every president since Richard Nixon has set energy independence as a goal, and both major candidates have brought it up the current campaign.

As it turns out, there is a place, not so far from here, that has achieved energy independence: Canada.

Canada produces far more oil than it consumes. They're not dependent on the Middle East! They've got all the oil they need!

I called Stephen Gordon, a professor of economics at Université Laval in Quebec City, to ask him about what energy independence means for his nation.

The story of the birth of accounting begins with numbers. In the 1400s, much of Europe was still using Roman numerals, and finding it really hard to easily add or subtract. (Try adding MCVI to XCIV.)

But fortunately, Arabic numerals (1, 2, 3, 4, etc.) started catching on, and with those numbers, merchants in Venice developed a revolutionary system we now call "double-entry" bookkeeping. This is how it works:

We set up our shell companies. Then we wondered: What do people actually do with shell companies?

One popular use, it turns out, is what professionals call "asset protection." Ordinary people call this "hiding money."

Maybe you're a surgeon worried a patient might sue you and take everything you have. Or you want to hide money from your ex (or your soon-to-be ex).

Nearly 13 million Americans have gotten, or will soon be getting, rebates from their health insurance companies. This is because of a provision in the Affordable Care Act (aka Obamacare) that's supposed to force insurance companies to run better.

But while the idea of getting a check from your health insurance company may sound great, some economists worry this rule could actually make health insurance more expensive.

The world inside Mark Zandi's computer model feels pretty familiar. It's full of people who are worried about the economy. Their homes are being foreclosed on. They're paying more for gas. Something like 13 million of them can't find jobs.