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Making a splash on Mars
Mars
Scientists, too, have speculated about the possibility of life on Mars. During the 1800s, some leading astronomers thought that an
Viking to Mars
NASA’s Viking 1 and 2 landers became the first spacecraft to touch down safely on Mars in 1976. From opposite sides of Mars, they photographed and analyzed their environments, finding a surface of iron-rich clay and a frigid atmosphere battered by giant dust storms. Experiments designed to look for signs of life produced inconclusive results, which scientists interpreted as meaning the Martian surface is sterile.
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