http://www.eurekalert.org/pub_releases/2012-10/uov-qcr100212.php
Subject: Re: [math-fun] A causes B causes A Am I missing something here, or isn't this all rather obvious?
--in QED (quantum electrodynamics, Feynman 1950s) and all subsequent particle physics, positrons can be interpreted as electrons moving backwards in time, and there is no one direction of causality in the Feymnamn diagram, several overlapping "directed causality paths" are overlapping and can go in "different directions" in portions. This has been well known since the 1950s and essentially all calculations in QED use it. It presumably is highly experimentally confirmed in the sense that QED is highly confirmed. So, if that press release is an accurate description of what they did (which I do not know), then that is pathetic.