Well its predicted by the theory of general relativity.
There is a certain amount of data that seems to support it, nothing conclusove but its early days.
They keep looking for conclusive proof and it is a long way from being disproven.
Interesting times.
http://en.wikipedia.org/wiki/Quantum_foam
Quote:According to Einstein's theory of general relativity, energy curves space time. This suggests that—at sufficiently small scales—the energy of these fluctuations would be large enough to cause significant departures from the smooth space time seen at larger scales, giving space time a "foamy" character.
There is a certain amount of data that seems to support it, nothing conclusove but its early days.
Quote:The MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes have detected that among gamma-ray photons arriving from the blazar Markarian 501, some photons at different energy levels arrived at different times, suggesting that some of the photons had moved more slowly and thus contradicting the theory of general relativity's notion of the speed of light being constant, a discrepancy which could be explained by the irregularity of quantum foam.[3] More recent experiments were however unable to confirm the supposed variation on the speed of light due to graininess of space.[4]
Other experiments involving the polarization of light from distant gamma ray bursts have also produced contradictory results.[5] More Earth-based experiments are ongoing[6] or proposed
They keep looking for conclusive proof and it is a long way from being disproven.
Interesting times.
http://en.wikipedia.org/wiki/Quantum_foam
You can fix ignorance, you can't fix stupid.
Tinkety Tonk and down with the Nazis.
