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A long-standing and controversial claim by the DAMA collaboration in Italy that it has observed dark matter has received fresh support from a US-based experiment. Like DAMA, the CoGeNT collaboration says that it continues to see a seasonal variation in the number of events registered in its detector. Such a variation would be expected if the Milky Way galaxy were shrouded in a "halo" of dark matter, but several other dark-matter searches have failed to see the effect.

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