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20 things to see on the Moon: An observer's guide to lunar names
The resulting lunar map is constantly evolving. Over time, new names are added while ... of the Railroad Tracks. The Moon's large basins were once dotted with craters, before volcanic flooding ...
The moon's grand canyons were carved in the blink of an eye
The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.