Nobel Prize winners in physics explain the implications of an expanding universe

By now you've probably heard today's announcement regarding the 2011 Nobel Prize in Physics. Three U.S. scientists — Saul Perlmutter, Adam Riess, and Brian Schmidt (picture left to right up top) — were honored for their 1998 discovery that our universe is expanding at an accelerating rate. » 10/04/11 1:56pm 10/04/11 1:56pm