Illuminating the Dark Universe

Science  19 Dec 2003:
Vol. 302, Issue 5653, pp. 2038-2039
DOI: 10.1126/science.302.5653.2038

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Portraits of the earliest universe and the lacy pattern of galaxies in today's sky confirm that the universe is made up largely of mysterious dark energy and dark matter. They also give the universe a firm age and a precise speed of expansion. The online version of the Breakthrough of the Year section contains references and links not found in the print edition (see