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Byline: Alexandra Witze
DALLAS _ Nobody ever had a favorite Venusian.
In the world of science fiction, Martians rule. Whether the alien life is ray-gun-toting robots or little green men, it always seems to come from Mars.
But in the world of science, Martians don't look anything like Ray Walston.
"Think lichens," said Mary Urquhart, a planetary scientist at the University of Texas at Dallas. "That would be your best bet."
On Saturday, NASA will take its latest step toward reconciling the science and science-fiction views of life on the Red Planet.
Late that night, Spirit, the first of two unmanned rovers, is scheduled to plunk down and begin six-wheeling across an ancient lakebed where life may once have wriggled. A second rover is scheduled to land Jan. 24. After those, NASA plans to fly another Mars mission every two years for the next decade at least _ precisely because the Red Planet offers hope for alien critters.