"If a dark matter particle comes in and hits the argon, the recoiling atom gets a kick of energy and it quickly tries to get rid of it, " says Dr Ghag.
BBC: Dark Matter: Experiment to shed light on dark particles
Julie McEnery, project scientist for the Fermi mission, said a deepening dark matter mystery has sparked the call for proposals to change the telescope's mission.
One possible explanation for these positrons is the mutual annihilation of the matter and antimatter forms of a type of dark matter called weakly interacting massive particles, also known as WIMPs.
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But it turns out they were adding a bit of dark matter to our Internet cosmos, perhaps just enough to shift the whole thing from open and expanding to closed and collapsing.
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The scientists involved in the project say the results coming from the spectrometer -- which are much more accurate than in past experiments -- are consistent with a fairly basic dark matter model, Flack said.
CNN: Space station detector gives first clues to 'dark matter'
Cosmologists reckon that at least a quarter of the universe is composed of dark matter, a mysterious substance that neither emits nor absorbs light.
Their overlap confirms the hypothesis that dark matter is the skeleton upon which visible matter is supported, and also lends weight to a second idea that galaxies form where dark matter accumulates at high densities, pulling visible matter with it.
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Since both are affected by gravity they are attracted to each other, so the distribution of normal, visible matter acts as a proxy for the distribution of dark matter.
Primack proposed an idea for dark matter in 1982 that is still a leading contender: The notion that supersymmetry is responsible for dark matter.
"Working in tandem, I think we can be confident of a resolution to the dark matter enigma sometime in the next few years, " Heuer said.
CNN: Space station detector gives first clues to 'dark matter'
And it is by measuring the ratio of the latter to the former, and the behaviour of any excess across the energy spectrum, which may provide a way into the dark matter problem.
Besides being a useful source of dark matter, it may explain the solar-neutrino deficit (the gap between prediction and observation would be caused by a different mutation, from electron neutrinos into undetectable tau neutrinos).
That's because as the Earth moves around the Sun, it is moving into a stationary field of dark matter - and for half the year it will be moving against the tide of dark matter - just like driving into the rain.
BBC: Dark Matter: Experiment to shed light on dark particles
Dark matter remains a mystery because there has been no direct observation of it, he explained.
CNN: Space station detector gives first clues to 'dark matter'
We think dark matter is a particle too, it's just an odd form of matter in the fact that we don't perceive it very readily.
BBC: Dark Matter: Experiment to shed light on dark particles
MACHOs could well be white dwarfs--overturning a common belief that the dark matter would consist mainly of lighter interstellar garbage such as brown dwarfs.
Figuring out what makes up dark matter is a big prize because it is the key to understanding the shape, size and even the fate of the universe.
Moreover, they also point out that there should be a second signal from annihilating dark matter, in the form of gamma rays coming from the Milky Way's halo.
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The standout beer from the outer-borough brewer was its Dark Matter, a product of their Brewmaster Reserve series, that begins with slightly bitter vanilla notes and has a welcome aftertaste of bourbon and berry notes.
So do candidates for the particles that make up dark matter, a shadowy substance whose presence can be deduced from its gravitational pull (see article) but which does not interact much via the three Standard-Model forces.
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It could also cast light on the mystery of dark matter, a substance that pervades the universe in vastly larger quantities than familiar, visible matter, but whose existence can be inferred only by watching its gravitational effect on visible matter.
After running their simulation on a supercomputer, they found that dark matter should annihilate much more readily than had previously been thought.
ECONOMIST: Two new ways to detect the elusive stuff of the universe
Those of you hoping for direct and obvious evidence of dark matter may be a little disappointed, but let's be honest -- you were being overly optimistic.
He plans to package "Dark Matter" with a short illustrated book that may also include the album's lyrics and a glossary, "like an epic textbook, " he said.
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The mission also hopes to give scientists a bigger clue as to the role dark matter and energy play in the universe.
For the past few years Dr Kuhlen and his colleagues have been working on a computer model of the halo of dark matter in which the Milky Way (the Earth's home galaxy) is thought to be embedded.
ECONOMIST: The search for dark matter: Ethereal yet weighty | The
Light particles passing through the void would be expected to lose a little more energy than those passing through space cluttered with matter - if dark energy is stretching the Universe apart at a faster and faster rate.
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The Alpha Magnetic Spectrometer was designed to search for dark matter by collecting high energy radiation known as cosmic rays, and then sort through it looking for a certain class of particle believed to be created after two bits of dark matter collide in space and destroy each other.
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This has posed a challenge for scientists trying to figure out where dark matter is.
They point to a body of other evidence for the existence of dark matter.
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