Spanish athlete Kilian Jornet competes on March 10 in the Beaufort region of France during the ski mountaineering competition Pierra Menta. Jeff Pachoud/AFP/Getty Images hide caption

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The Extended Beauty Of Photosynthesis

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NASA's Hubble Space Telescope reveals a cluster of more than half a million stars in the Milky Way galaxy using infrared vision. NASA, ESA and Hubble Heritage Team hide caption

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NASA, ESA and Hubble Heritage Team