Multiple Choice
The so-called "canals" that Schiaparelli and Lowell reported seeing on the surface of Mars were actually
A) the remnants of the walls of ancient craters that have been eroded by winds and dust over Mars's history.
B) river valleys caused by massive floods early in Mars's history.
C) lines of volcanoes along faults in the Martian surface.
D) optical illusions.
Correct Answer:
Verified
Correct Answer:
Verified
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