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Science 18 August 2006:
Vol. 313. no. 5789, pp. 925 - 926
DOI: 10.1126/science.1127780
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Perspectives

ASTRONOMY:
Enhanced: A Journey Through Time

Joseph Silk

Small variations in the temperature and density of matter just after the Big Bang are thought to have been the seeds for the galaxies we see today. This picture has been confirmed by observational evidence.

The author is in the Department of Physics, University of Oxford, Oxford OX1 3RH, UK. E-mail: silk{at}astro.ox.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)