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CAMBRIDGE, Mass. (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.
The water will come from thousands of little jets that can be switched on and off, rapid-fire, by computer-controlled sensors.
The resulting effect will enable images and text to scroll in the water walls. Or as a person approaches, the sensors could shape the water flow to make a door appear anywhere in the wall, and then close it after the person ambles through.
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