WASHINGTON, Jan 16: Organic chemicals found in a Martian rock may be contamination from Earth and not evidence of life on the red planet, new studies suggest. But US Space scientists say the reports ``don't shake our belief one bit.''Studies at the University of Arizona, Tucson, and the Scripps Institute of Oceanography conclude that amino acids and carbon found in a rock from Mars probably got there after the rock landed on Earth and lay on Antarctic ice for thousands of years. This disputes a theory led by two NASA scientists that found evidence that Martian microbes once lived inside the rock and left behind fossil-like blobs and organic chemicals.
