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DAVID BIANCULLI, HOST:

This is FRESH AIR. I'm David Bianculli sitting in for Terry Gross. Ravi Shankar, who popularized the sitar and Indian music in America, died this week at the age of 92. He befriended the Beatles, gave George Harrison sitar lessons, and inspired Harrison to launch the first superstar benefit concert, 1971's the Concert for Bangladesh.

That's when Ravi Shankar, tuning up before his performance, responded to the polite but clueless support of the U.S. audience. His ad lib was good humored but pointed.

(APPLAUSE)

Transcript

IRA FLATOW, HOST:

Transcript

IRA FLATOW, HOST:

This is SCIENCE FRIDAY. I'm Ira Flatow. Of course we'll be following any updates in the school shooting in Connecticut that has left dozens of people dead, including children and the gunman. Any updates that are necessary, we'll break in and let you know.

Imagine one day, just one day, where the world you saw was upside-down: water poured up; smoke drifted down; balloons acted more like lead weights. It might be enough to drive you crazy. Could you handle two days? Three? How about 10 days with your vision turned completely on its head?

If you're fascinated by the story of anti-virus software pioneer John McAfee and his flight from Belize after authorities there said they want to talk to him about a neighbor's murder, CNBC has abo

Alan Alda founded The Flame Challenge last year to promote better science communication, and he started by asking scientists to come up with a kid-friendly explanation for a flame. Now, Alda is back with round two of the popular contest, and kids want to know: What is time?

Did you know plants use quantum mechanics every day? That quantum computers can hack the encryption used in online commerce? Or that a 'quantum internet' could someday teleport your emails? MIT's Seth Lloyd discusses those and other quantum mysteries in this episode of "Ask a quantum mechanic."

Nothing beats the smell of a live Christmas tree in your home, but how can you keep the needles on your tree and off your carpet? Rick Bates, professor of horticulture at Penn State University, offers tips for how to properly care for your Christmas tree this holiday season.

In this week's Barbershop, the guys weigh in on U.N. Ambassador Susan Rice withdrawing her name from consideration for secretary of state. They also discuss Michigan's right-to-work law and whether unions are still relevant today.

Lawrence Guyot spent his life fighting for civil rights - but often at great personal cost. He was jailed and beaten regularly by police in the Deep South while helping black people get involved in politics. Host Michel Martin speaks with Washington, D.C. Congresswoman Eleanor Holmes Norton, who worked alongside Guyot, about his life and activism.