Mars - Next Planet - Back to Planet Walk
Before space craft from Earth visited Mars, it was thought that the surface of Mars was marked with straight lines, thousands of miles long. These "canals" were thought to have been built by inhabitants of Mars. We now know that these long straight lines are windblown dust streaks or other naturally occurring geological features, and there is no evidence yet that proves life exists or existed on Mars.
The picture of Mars shown above is 100 times larger than the scale of the Planet Walk. Courtesy NASA.
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