Did Einstein Get it Wrong?

Lawrence Krauss of Case Western Reserve University was featured together with Einstein on the science page of the April 18 Tampa Tribune, as shown in this photo. The article promoted a public lecture that Krauss gave that evening at the APS April meeting, and perhaps partly as a result there was an excellent turnout to hear about "Einstein’s Biggest Blunder," which is how Einstein himself allegedly described his introduction of the cosmological constant. Although Einstein’s original motivation was unfounded, we now know that the cosmological constant, or something very much like it, is the dominant source of energy in the present-day universe.