A Foamy Road to Ultimate Reality

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Science  24 May 2002:
Vol. 296, Issue 5572, pp. 1420
DOI: 10.1126/science.296.5572.1420

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We know spacetime can ripple and curve and twist, but what does its fabric look like on very small scales? Nobody knows for sure, but when physicists find out, it may drastically alter our view of the universe--and of space and time.