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Wouldn't a collapsed tube be very distinctive visually?
by robryk 9y ago
Wouldn't a collapsed tube be very distinctive visually?
- nkoren 9y agoVery much so -- and one has even been explored by humans! https://en.wikipedia.org/wiki/Hadley%E2%80%93Apennine https://en.wikipedia.org/wiki/Hadley%E2%80%93Apennine