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    What is Crackamite?

    http://www.crackamite.com/crackamite.html How does this stuff work chemically speaking? Could the WTC have stood with this stuff drilled into the floors until the upper block fell or something shook the building? What effect would compromising the concrete floors have on the steel columns and...
  2. rustytunes

    Avogadro Project, Re-defining the Kilogram

    Making the roundest object in the world - very cool stuff: CSIRO scientists and optical engineers are working to turn a silicon cylinder into the perfect one kilogram sphere. The Avogadro Project plan is to bring together enough atoms of one substance, silicon, to make the perfect kilo...

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