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Mars-Tube by S.D. Gottesman:
Science Fiction Inventions, Technology and Ideas
"The dead Martians had made no distinction between fact and fiction in their writings. So naturally, Earth’s archaeologists took it for granted that some of the impossible things they mentioned were fictitious. . . ."

('Mars-Tube' by S.D. Gottesman)
Read it here. Select
an invention:
Mars-Tube A remarkable subway system beneath the surface of Mars.
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Spider Robot Guard The tunnels of the Mars-Tubes were guarded by fierce spider-like robots.
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