Countless science fictions books and films have shown Martian armies attacking the Earth, marching across our planet and enslaving or eradicating any humans they come across. Obviously this hasn't happened ... yet!
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See also:
NASA Spacecraft Fine Tunes Course For Mars Landing
And...
Music Has Its Own Geometry, Researchers Find
Finally! The 'Robot Hall of Fame'
World's Oldest Living Tree -- 9550 years old
