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If we could somehow - dare I say it? - genetically modify each human being so that their skin glow under a different frequency (do I mean frequency?) of light, then bathing each room in a sweep of that colour would show up whose skin is whose. |
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I think that it's wavelengths, but it has been a few years since I've taken physics. |
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This idea did cause me to wonder, "Do industrial clean-rooms require cleaning?" Wee Mad Arthur may have been on the right track: Install positive pressure air flow throughout the house, and vacuum pressure air locks at each point of ingress and egress. Electrostatic air cleaners running 24 hours a day take care of the rest. Marketers could dub this the "Mr. Clean House", or "Bubble Boy Abodes". |
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