NASA's Fermi mission expands its search for dark matter

Dark matter, the mysterious substance that constitutes most of the material universe, remains as elusive as ever. Although experiments on the ground and in space have yet to find a trace of dark matter, the results are helping ...

How a star cluster ruled out MACHOs

Are massive black holes hiding in the halos of galaxies, making up the majority of the universe's mysterious dark matter? This possibility may have been ruled out by a star cluster in a small galaxy recently discovered orbiting ...

Hunting for dark matter's 'Hidden Valley'

Kathryn Zurek realized a decade ago that we may be searching in the wrong places for clues to one of the universe's greatest unsolved mysteries: dark matter. Despite making up an estimated 85 percent of the total mass of ...

New detectors allow search for lightweight dark matter particles

The Earth, planets, stars, and galaxies form only the visible portion of the matter in the universe. Greater by far is the share accounted for by invisible "dark matter". Scientists have searched for the particles of dark ...

XENON100 sets record limits for dark matter

Scientists from the XENON collaboration announced a new result from their search for dark matter. The analysis of data taken with the XENON100 detector during 13 months of operation at the Gran Sasso Laboratory (Italy) provided ...

Neutrons escaping to a parallel world?

In a paper recently published in European Physical Journal C, researchers hypothesised the existence of mirror particles to explain the anomalous loss of neutrons observed experimentally. The existence of such mirror matter ...

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