Too Slow, Great Effects
George Pal made a realistic movie(except for the godawful father-son histrionics-unbearable and sank the movie, IMHO)which included the possibility of plant life on Mars surviving. The "flight to Mars" was well done, especially the funeral in space-great image! Pal had the courage to make a movie about landing on Mars that did not involve monsters.
However, all of this proceeded too slowly. Also, the commander's religious fanaticism apparently only became a reality once the mission to Mars began. That did not ring true to me. This commander of the UN's space station and first flight to Mars has a mental breakdown?
Give Pal credit for including a Chinese character with a big role(Mr. Fong was Hopsing on Bonanza). The unity of this WW2 generation in a 1955 movie(as in many others from that era) almost strikes me as an alien culture in a 2010 America which seems to be flying off into a million different directions. A truly weird feeling. Conquest Of Space is a mixed bag, but George Pal always demanded state of the art special effects, so this movie certainly deserves a look!