Observations from the Astronef reveal that Mars is an aging planet with diminishing seas and expanding continents[1]. The famous canals, which have long puzzled terrestrial observers, are seen to be semi-regular divisions across the land masses[1].
These canals are interpreted as the remnants of gulfs and straits that have been widened, deepened, and lengthened by Martian labor[1]. This suggests their purpose was partly for navigation and partly to keep the inhabitants of the interior within reach of the sea[1]. The planet also has scarcely any mountains, only low hills, indicating a worn-down surface consistent with such extensive engineering[1].
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