Exploring Science At The End Of The Earth

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NASA Probes Set To Orbit The Moon Over New Year's

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Year in Review: Science Stories of 2011

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Researchers claimed in late 2010 that they found bacteria in Mono Lake, Calif., that survived on the poison arsenic in the place of an element thought essential to life. The report was immediately greeted with skepticism from the scientific community. Ben Margot/AP hide caption

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Ben Margot/AP

Debunked Science: Studies Take Heat In 2011

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A group of harbor porpoises in San Francisco Bay, photographed from the Golden Gate Bridge. Harbor porpoises haven't been seen in the bay since the 1930s. Researchers believe World War II activity may have contributed to their disappearance. The Navy strung a seven-mile underwater net across the mouth of the bay to keep out enemy submarines. William Keener/Golden Gate Cetacean Research hide caption

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William Keener/Golden Gate Cetacean Research

60 Years After Leaving, Porpoises Again Play In SF Bay

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A Kemp's ridley sea turtle like this one traveled 4,600 miles across the Atlantic ocean in 2008. After being rehabilitated in Portugal, it is being reintroduced into its native Gulf of Mexico waters on Tuesday. US EPA via flickr hide caption

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US EPA via flickr

Endangered Turtle Survives Trans-Atlantic Journey

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Leonardo DaVinci noted that when trees branch, smaller branches have a precise, mathematical relationship to the branch they sprang from. iStockphoto.com hide caption

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iStockphoto.com

The Wisdom Of Trees (Leonardo Da Vinci Knew It)

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Frankincense comes from the Boswellia sacra tree, which grows mainly in the Horn of Africa. The number of trees that produce the fragrant resin could decline by 90 percent in the next 50 years. scott.zona/flickr hide caption

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scott.zona/flickr

Trees In Trouble: Grim Future For Frankincense

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Northern cardinals have higher-pitched songs, but those sounds can get garbled in cities, so they've started to sing a little lower. Dr. Scott M. Lieberman/AP hide caption

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Dr. Scott M. Lieberman/AP

To Flirt In Cities, Birds Adjust Their Pitch

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Birders Fan Out to Count Feathered Friends

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The Science Behind 'Breaking Bad'

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Building Bridges From Plastic Shampoo Bottles

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The War On Cancer Turns 40

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Kepler Telescope Narrows Hunt For Earth's Twin

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