NPR News

Election Day has come and gone, but NPR's Ron Elving and Ken Rudin are still trying to make sense of it all. Was it close? Well, a 50-to-48 percent popular-vote edge for President Obama certainly indicates that.

But the president won just about every battleground state, pushing his Electoral College totals into landslide proportions. And, the Democrats did far better in the Senate than anyone expected.

The Iranian defense minister confirmed today that his forces had shot a U.S. drone. But Brig. Gen. Ahmad Vahidi said it shot at the MQ1 Predator drone because it had trespassed into its airspace, The New York Times reports.

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FLORA LICHTMAN, HOST:

This is SCIENCE FRIDAY. I'm Flora Lichtman. In his new book "Hallucinations," Oliver Sacks writes that you see with your brain, not with your eyes. And his book suggests our brains can play some bizarre tricks on is. Dr. Sacks describes a musician who sees intricate but unplayable sheet music superimposed on his field of vision.

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FLORA LICHTMAN, HOST:

Here's a big, giant question for you: Why do we believe what we believe? And how is it that two people can look at the exact same set of circumstances and see two completely different things? That philosophical question is at the center of a new book where, to put it another way, one person's beautiful miracle is another person's ecological crisis.

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FLORA LICHTMAN, HOST:

And one last salute to science before the weekend. Here are some news you can raise the glass to. Microbiologist Tomas Villa and colleagues report that they may be able to bioengineer better beer foam. That's right.

TOMAS G. VILLA: Beer foam. Foam is what you like the most in a beer. And a beer drinker wants foam to stay longer, right?

LICHTMAN: Of course. And the secret to long-lasting froth, proteins, produced by barley and yeast during fermentation.