Solar System in fiction close to the Sun and its surface was exposed to extremes of temperature. The asteroids were too tiny and airless. By the early 20th century, prospects for life in the Solar System focused on Venus, the larger moons of Jupiter and Saturn, and especially Mars. With the onset of the Space Age, planetary probes cast increasing doubt on the likelihood of extraterrestrial life in the Solar System, at least life of any magnitude greater than organisms such as bacteria. By the mid-1960s, it was firmly established that life could have no foothold on the hostile surfaces of Mercury or Venus,
Mr. Martian Mr. Martian Mr. Martian (AKA: CH'kk Kk'xx – Chuck Cox) is a fictional character in Big Bang Comics, who first appeared in "Big Bang" #21, but didn't receive his own story until "World Class Comics" #1. CH'kk Kk'xx is a Martian originally sent to investigate planet Earth and see that the Nuclear Age went without disaster. CH'kks' spaceship crashed outside of Roswell after being shot down by the American Air Force, mistaking it for a Communist attack. CH'kk went underground as Chuck Cox, and soon came to like the Earth, and instead decided to defend it from his own planet.