Wednesday

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In a speech to the U.S. Chamber of Commerce on Monday, President Obama talked about the importance of working together on job creation and growing the economy. Mark Wilson/Getty Images hide caption

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Friday

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Researchers have sequenced the genome of the common water flea, Daphnia, shown in this false-color micrograph. About 35 percent of the genes are brand new to science. Jan Michels/Christian-Albrechts-Universitat zu Kiel hide caption

toggle caption Jan Michels/Christian-Albrechts-Universitat zu Kiel
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