World's Fair to Have Walls Made of WaterJuly 11, 2007 By BRIAN BERGSTEIN, AP Technology Writer in Technology / Other
(AP) -- Walking through walls will be possible and even encouraged. When next year's world expo opens in Zaragoza, Spain, fairgoers will encounter a building with walls made of thin sprays of water. Inside, there will be normal building stuff: a cafe, an exhibition space and overhead lighting.
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"World's Fair to Have Walls Made of Water" July 11, 2007 http://phys.org/news/2007-07-world-fair-walls.html