The "missing mass" of the universe, once thought discovered, seems to have disappeared once again. It would seem the team which claimed the first discovery realized, from later evidence, that their energy sources were nowhere near as massive as they first thought. Poof! No more mass for you!

I think. Due to remodeling most of my office's ceiling tiles are down and there's a roaring plenum over my head. Thinking's hard when your ears are ringing.