An international experiment aboard the International Space Station (ISS) today reported the observation of an excess of positrons in the cosmic ray flux, the source of which could be the elusive dark matter.

This forms the most important part of the first results from the experiment, called the Alpha Magnetic Spectrometer (AMS), which were reported by the experiment’s spokesperson, Nobel Laureate Samuel Ting of the Massachusetts Institute of Technology (MIT) at the meeting of the American Association for Advancement of Science (AAAS) at Boston, Massachusetts.

The mysterious dark matter, which is believed to account for a quarter of the universe’s mass-energy balance and is distributed isotropically — invariant with respect to direction — in the space, can be observed…

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