As the site notes, there are good theoretical reasons to suspect the neutralino as a dark matter particle, but this is no done deal. Neutralinos "are Majorana fermions and will annihilate with each other... resulting in the symmetric production of particles and antiparticles, the latter providing an observable signature" that PAMELA plans to capture.
Since within the first second after the big bang. As some clever wikipedist put it, "No known physics can explain the fact that there are so many more baryons in the universe than antibaryons." Apparently these must be produced in pairs, and of course matter and antimatter annihilate into radiation upon contact, so apparently, after the Grand Annihilation, which produced a lot of radiation, there was somehow a slight excess of matter particles over antimatter, and that excess now makes up all the matter in the universe.
Originally Posted by Durakken
Everyone is entitled to his own opinion, but not his own facts.