Science. 1965 Aug 6;149(3684):627-30. doi: 10.1126/science.149.3684.627.
The 22 photographs of Mars taken by Mariner IV have been successfully received on earth. The Martian surface photographed is rather densely populated with impact craters whose sizes range up to at least 120 kilometers in diameter. We infer that the visible Martian surface is extremely old and that neither a dense atmosphere nor oceans have been present on the planet since the cratered surface was formed.
水手四号拍摄的 22 张火星照片已成功传送到地球。所拍摄的火星表面布满了大小不一的陨石坑，最大的直径至少有 120 公里。我们推断，可见的火星表面非常古老，自从布满陨石坑的表面形成以来，这个行星上既没有稠密的大气层，也没有海洋。
