Proxima Centauri lies in the constellation of Centaurus (The Centaur), just over four light-years from Earth. Although it looks bright through the eye of Hubble, Proxima Centauri is not visible to the naked eye. ESA/Hubble & NASA hide caption

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ESA/Hubble & NASA

When the Galileo spacecraft swooped by Jupiter's frozen moon Europa in Nov. 1997, views of its blistered surface strengthened suspicions that a briny ocean harboring life could lie beneath an icy crust. AP hide caption

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AP

Jeralean Talley addresses the congregation as her pastor, Reverend Dana Darby, holds the microphone for her during a celebration of her 115th birthday. Rebecca Cook/Reuters /Landov hide caption

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Rebecca Cook/Reuters /Landov

From Pork To Onion Sandwiches: Secrets To Supersurvivors' Long Lives

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