I am searching like mad to find the article either in Discover or Popular Science, but it was testing supergravity, a fun effect in M-Theory where particles brought close enough for the extra curled up dimensions to touch and gravity's force is greater than G m1 m2 / r^2, and showed that the dimensions were smaller than some extremely minute distance.
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Originally Posted by Thermopyle
But accordingly the M-theory, there are 11 dimensions. 3 visible, 1 timedimension and 7 dimension tightly rolled with a diameter minor to the Plancklength of 10^-35m or something.
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I havent read anywhere that the dimensions are smaller than Plank's length. If it were than this experiment is fairly useless since we cannot measure distance that small. If anyone remembers the issue with the article (and preferably what the cover was of) post it here.