Scientists have proposed building a Wall of Death for the first lunar colonists

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According to preliminary calculations, lunar colonists will have to move at a speed of over 12.8 kilometres per hour to avoid falling while running along a vertical wall. Some experts are not so optimistic and admit that the approach may not work because the first Selenaut dwellings are likely to be very small. Despite the doubts, the idea looks fun and may prove useful not only to space conquerors.