Where are all those high energy positrons coming from?

Where are all those high energy positrons coming from?

Special to WorldTribune.com [CLICK ON IMAGE FOR HIGH RESOLUTION, Ron Garan, STS-134 Crew, Expedition 28 Crew, NASA] Where did all these high energy positrons come from? The Alpha Magnetic Spectrometer (AMS-02) onboard the International Space Station (ISS) has been meticulously recording how often it is struck by both high energy electrons and positrons since 2011. […]