ATLAS sees first direct evidence of light-by-light scattering at high energy
There&#x27;s an interesting implication here for redshift observations and Hubble expansion, insofar as it provides a mechanism for photons to lose energy while in a highly sparse medium, populated largely only by other photons.<p>I&#x27;m keeping my money on expansion and dark matter being hooey brought about by incomplete of incorrect understanding of light.<p>Only recently there was that rather interesting piece about simulated momentum transfer from photons in media.<p>It&#x27;s exciting - we&#x27;ll potentially be lopping off a huge branch of dead wood from the tree of science, from which new ideas can grow.