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New study on climate change

Anchor Lisa Mullins talks with Cynthia Rosenzweig, the lead author of a new study on climate change; Rosenzweig finds compelling evidence that climate change is already having a profound impact on eco-systems around the globe.

Environment

Marcus Du Satoy

Faith talks to Oxford University mathematician Marcus du Sautoy about his new book, "Symmetry: A Journey in the Patterns of Nature."

Environment

Britain opens UFO files

The World's Clark Boyd reports that Britain's Ministry of Defense has released files related to sightings of "Unidentified Flying Objects" over the past 30 years.

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