Life on Mars life were found. Mariner 4 probe performed the first successful flyby of the planet Mars, returning the first pictures of the Martian surface in 1965. The photographs showed an arid Mars without rivers, oceans, or any signs of life. Further, it revealed that the surface (at least the parts that it photographed) was covered in craters, indicating a lack of plate tectonics and weathering of any kind for the last 4 billion years. The probe also found that Mars has no global magnetic field that would protect the planet from potentially life-threatening cosmic rays. The probe was able to calculate
Mars 2 of entry was too steep. The descent sequence did not operate as planned and the parachute did not deploy. The descent module became the first man-made object to impact the surface of Mars. The exact crash site is unknown, but it is estimated to be at . Attempts to contact the probe after the crash were unsuccessful. Mars 2 The Mars 2 was an unmanned space probe of the Mars program, a series of unmanned Mars landers and orbiters launched by the Soviet Union May 19, 1971. The Mars 2 and Mars 3 missions consisted of identical spacecraft, each with