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The common roof moss (Ceratodon purpureus) grew in striking, clockwise spirals, according to Fred Sack, the study's lead investigator and a professor of plant cellular and molecular biology at Ohio State University....The researchers expected random, unorganized growth, as seen with every other type of plant flown in space."We don't know why moss grew non-randomly in space, but we found distinct spiral patterns," Sack said.