In August 2008, the Phoenix Mars Lander was collecting soil samples on the red planet. This photo from NASA shows its solar panel and robotic arm.
NASA/AP/File
Life on Earth occupies some bizarre places – pools of pitch in Trinidad and Tobago, deep-sea hydrothermal vents, and frigid, lightless lakes capped by glaciers. While scientists hunt for hospitable planets circling other stars, the solar system has a few candidates. Here are five.
In August 2008, the Phoenix Mars Lander was collecting soil samples on the red planet. This photo from NASA shows its solar panel and robotic arm.
NASA/AP/File
Early in its history, the red planet had abundant surface water. Could microbes lurk underground?
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Why IRS investigation is already Obama's Watergate – and Benghazi, too
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