1

Pfizer, one of the largest drug makers in the U.S., saw $27.8 billion in sales in 2009. Seven drug companies, including Pfizer, have disclosed information about doctors who receive payment for speaking fees related to products they sell. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP
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2

Scientists exposed the brains of specially engineered lab mice to pulses of light and saw brain cells responding as if they were triggered by an odor. The research could be applied to diseases including Alzheimer's and Parkinson's. Eric Isselee/iStockphoto.com hide caption

itoggle caption Eric Isselee/iStockphoto.com
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Swan Match Aquavee 0:20

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    Girls in Space: Beats That Are Out of This World
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China Syntax Apache 61 1:30

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4

Candidates in the New York governor's race — Carl Paladino (from left), Jimmy McMillan, Andrew Cuomo, Charles Barron, Howie Hawkins, Kristin M. Davis and Warren Redlich — participate in Monday's debate at Hofstra University in Hempstead, N.Y. Audrey Tiernan, Pool/AP hide caption

itoggle caption Audrey Tiernan, Pool/AP
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Infra 5 Max Richter 0:15

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Easy Rockin' The Grandsons 0:30

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    Live at the Barns: The Legendary Wolf Trap Recordings, Vol. 2
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Supercrash Kerosene 0:05

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Household names Stereolab 0:30

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Lost in Time Nigel Kennedy 0:05

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    East Meets East
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Lullaby for Kamila Nigel Kennedy 1:30

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10

Chevy hopes it can gain some momentum in the small-car market with the Chevrolet Cruze. But it will face competition from Ford, Honda and Toyota. Steve Fecht/General Motors via Getty Images hide caption

itoggle caption Steve Fecht/General Motors via Getty Images

Wole Featuring: Lionel Loueke Jowee Omicil 0:30

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End Transmission Declassified 0:30

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13

President Obama and Gen. Stanley McChrystal in the Oval Office on May 19, 2009. McChrystal's firing this summer following his comments in a magazine interview prompted soul-searching within the military. Pete Souza/The White House/Getty Images hide caption

itoggle caption Pete Souza/The White House/Getty Images
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Improvisation #2 Mark O'Connor 0:15

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Midnight on the Water/Bonaparte's Retreat Mark O'Connor 1:30

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14

Facebook CEO Mark Zuckerberg at Facebook headquarters in Palo Alto, Calif., on Oct. 5. Facebook said it was working to fix the privacy problem reported by The Wall Street Journal. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP
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15

Bates and his research team used pingpong balls and red pipe cleaners to model the "hairy spherical block copolymer particles." The actual spheres are roughly 1 million times smaller, and each contains about 200 polymer molecules, represented by the red pipe cleaners. Courtesy of Frank Bates hide caption

itoggle caption Courtesy of Frank Bates
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Truffaut's Hat Loop Guru 0:13

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The Man [El Hombre de la Pampa Mix] Gotan Project 0:30

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The Would-Be Cyarina Tin Hat Trio 0:22

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The Would-Be Cyarina Tin Hat Trio 0:30

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17

Former Rep. Tom Tancredo, the Constitution Party candidate (left), Republican candidate Dan Maes (center), and Denver Mayor John Hickenlooper, a Democrat, at a television debate last month. Tancredo's presence in the race has split the Republican vote. Ed Andrieski/AP hide caption

itoggle caption Ed Andrieski/AP
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Who's to Blame Various 0:35

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    9 Pianists - Our Town, Our Time

A Minor Shuffle Various 2:00

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Infra 5 Max Richter 0:20

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Helium Tin Hat Trio 0:55

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    Helium
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