They were kidding, Al.

In any case, it's not the absense of positrons in primary high energy
galactic cosmic rays (GCR) and associated anihillation radiation that
convinces us there's no antimatter out there (at least in our own
galaxy). Because in fact such rays contain not only positrons but
anti-protons as well, and these come from outside the atmosphere, as
shown in balloon and space collection studies. Unfortunately these can
be, an probably are, produced by proton-proton collisions in the
interstellar medium.

It's the absense of anti-nuclei *heavier than hydrogen* in GCR that is
the real clue.

Just thought you might like to know.

And if you were calling *me* an idiot, that's not safe. Not if you want
to continue posting here, because I will make you pay for it.

SBH