August 18, 2010
Astronomers have experienced the galactic equivalent of discovering pictures of a mild-mannered grandmother partying as a wild youth. New observations from NASA's Spitzer Space Telescope reveal the early "wild" days of galaxy clusters -- a time when the galaxies were bursting with new stars...
(Read the rest of http://www.jpl.nasa.gov/news/news.cfm?release=2010-271)