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The search for dark matter continues with mixed results. China unveils its new particle accelerator, but it's not for particle physics

By Philip Ball   June 2009

Dark matter continues to puzzle

No one seems sure what to make of the latest results from a space telescope searching for dark matter. Some reports have claimed that the Fermi Gamma-Ray telescope may have detected a faint trace of the elusive stuff. Other accounts imply that the Fermi data actually squelches earlier claims to that effect.

Dark matter is so named because it can’t be seen directly and isn’t composed from any known subatomic particles. But we know it exists from the gravitational tug it exerts on visible matter and it makes up around 85 per cent of the…

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