Scientists Find Hint of Dark Matter
http://online.wsj.com/article/SB10001424127887324100904578400561013329912.html

By GAUTAM NAIK

A space experiment may have identified a new particle that is the building block of dark matter, the mysterious stuff that’s said to pervade a quarter of the universe and yet neither emits nor absorbs light.

The results are based on a small amount of data and are far from definitive, scientists said Wednesday. Yet, they provide a provocative hint that the puzzle of dark matter—a cosmic prize as eagerly sought as the now-discovered Higgs boson—may also be on its way to being solved.

The results are the first obtained by a $2 billion particle detector, known as Alpha Magnetic Spectrometer, or AMS, that is mounted on the exterior of the International Space Station. It collects and identifies charged cosmic rays arriving from the far reaches of space.

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