Hubble Astronomers Uncover an Overheated Early Universe

If you think global warming is bad, 11 billion years ago there was universal warming. During this period, fierce radiation blasts from active galaxies stunted the growth of some small galaxies for approximately 500 million years. This is the conclusion of a team of astronomers who used the new capabilities of NASA's Hubble Telescope to probe the invisible, remote universe. The team's results will appear in the Oct. 20 issue of The Astrophysical Journal.

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