One gets accustomed to be skeptical of all new claims. But I have read about stuff similar to this before. What makes this different is the amount of antimatter that may be available in our own cosmic backyard. That may make it accessible to us, if we so choose.
From the pdf file source link in the Next Big Future post:
Antiprotons trapped in Earth’s inner radiation belt have been observed for the first time by the PAMELA satellite-borne experiment
PAMELA was launched from the Baikonur Cosmodrome on 2006 June 15 on board the “Resurs-DK1” satellite.
Since launch, PAMELA has collected an unprecedented number of antiprotons
and positrons, as reported in recent publications