This story is a supplement to the feature "Using Causality to Solve the Puzzle of Quantum Spacetime" which was printed in the July 2008 issue of Scientific American.
Simulation Results:
By the authors’ calculations, the spectral dimension of spacetime shades from four (on large scales) to two (on small scales), and spacetime breaks up from a smooth continuum into a gnarled fractal. Physicists are still puzzling over whether this conclusion means that spacetime ultimately consists of localized “atoms” or is built up out of intricate patterns only very loosely related to our usual concepts of geometry.
