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An x-ray feature recently detected by different astronomy groups may be the long-awaited signature of dark matter.
Two leading dark-matter-detection experiments find conflicting results in the search for dark matter.
Two experiments have detected the signature of a new particle, which may combine quarks in a way not seen before.
Measurement of a rare-meson decay is an experimental achievement worth celebrating, but so far, no new physics beyond the standard model is indicated.