Atom & Cosmos.

The article discusses articles on atoms and cosmology published in previous issues including one on the transformation of the Hubble Space Telescope into an observatory in the May 19, 2009 issue, one on the discovery that supermassive black holes may be bigger than previously thought in the July 4, 2009 issue, and one on the possible discovery of dark matter in the January 2, 2010 issue. INSET: Water on the moon.