The positrons (antimatter electrons) detected in this study are fairly easy to produce on Earth--certainly more cheaply than building satellites. http://en.wik

The positrons (antimatter electrons) detected in this study are fairly easy to produce on Earth--certainly more cheaply than building satellites. http://en.wikipedia.org/wiki/Positron#Production http://en.wikipedia.org/wiki/Positron#Production Positrons are also produced in some radioactive decays as well as in accelerator experiments.