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ISS detector finds dark matter clues

A $2bn experiment on the space station has made observations that could prove to be the first signs of dark matter, a mysterious component of the Universe.

The Alpha Magnetic Spectrometer (AMS) surveys the sky for high-energy particles, or cosmic rays.

It has seen evidence for what could be dark matter colliding with itself in a process known as "annihilation".

AMS deputy spokesman Roberto Battiston, a professor of physics at Trento University, Italy, describes the purpose of the AMS experiment.