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Science 21 May 2004:
Vol. 304. no. 5674, p. 1092
DOI: 10.1126/science.304.5674.1092b
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News of the Week

COSMOLOGY:
Galaxy Clusters Bear Witness to Universal Speed-Up

Adrian Cho

No matter how you measure it, the expansion of the universe is speeding up. Or so say researchers who have studied the x-rays coming from far-flung clusters of galaxies.

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