Got mass? Princeton scientists observe electrons become both heavy and speedy http://www.princeton.edu/main/news/archive/S33/94/41S36/
"It is remarkable to watch electrons moving in a crystal evolve into more massive particles as we cool them down," said Ali Yazdani, a professor of physics at Princeton and head of the team that conducted the study." This is consistent with my belief that inertia is form of coldness and that coldness is something substantively real rather than merely being the mere absence of heat. Harry