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Corning's Gorilla Glass isn't totally unbreakable, as anyone who's dropped a smartphone knows. But it's twice as durable as regular glass--at half the thickness. How do they do it? Dave Velasquez, director of marketing and commercial operations for Gorilla Glass, talks about the innovations that make this ultrastrong, ultralight glass possible.

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IRA FLATOW, HOST:

This is SCIENCE FRIDAY. I'm Ira Flatow. 21 years ago this week, way back in October of 1991 on the first ever episode of SCIENCE FRIDAY, one of our show topics was the ozone hole, that bite out of the Earth's ozone layer caused by chemicals in our refrigerators, air conditioners, cans of hairspray. Our guest that day was the late Sherwood Rowland, who would go on to win the Nobel Prize for his work on the ozone hole.

Artist Julian Hoeber's "Demon Hill," now on view at the Harris Lieberman Gallery in New York City, is modelled after a roadside attraction called a "gravitational mystery spot" — where water runs uphill and gravity doesn't behave as expected. Science Friday talked to cognitive scientist Michael Landy about what happens to our perceptual system inside the exhibition.

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CELESTE HEADLEE, HOST:

This is TELL ME MORE from NPR News. I'm Celeste Headlee. Michel Martin is away. Coming up, President Obama honored late labor and civil rights leader Cesar Chavez earlier this week but a new book questions whether the full story of his life and legacy isn't perhaps more complicated. That's in a moment.

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CELESTE HEADLEE, HOST:

This morning, the Norwegian Nobel Committee announced the winner of the 2012 Nobel Peace Prize and they chose the European Union.

THORBJORN JAGLAND: The European Union is currently undergoing grave economic difficulties and (unintelligible) social unrest. The Norwegian Nobel Committee wishes to focus on what it sees as the EU's most important result, the successful struggle for peace and reconciliation and for democracy and human rights.

"U.S. consumer sentiment unexpectedly rose to its highest in five years in October as consumers became more optimistic about the economy in a possible boost to President Obama's reelection hopes," Reuters reports.

Secretary of Defense Leon Panetta delivered a policy speech that he said was a "clarion call" for Americans to take cyber security seriously. Attacks that can cripple a country, he said, are no longer theoretical.