Transcription: Why did astronomers believe that there was life or could have been artificial structures on this planet? Well, when the seasons change on the surface of Mars, the winds pick up the dust that covers certain regions and to other regions. This changes the color of the Martian surface, and when these variations are seen through telescopes from the Earth, they can be mistaken for possible changes or variations in plant life. This is the origin of these errors. Also, with some observations in the past seem to show that Mars had canals. These canals, in fact, have nothing to do with structures that m ...
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