When I took physics microscopes had images of small black dots scientists were considering anti matter.
I suggest these are frozen atoms smaller than when a balloon full of air shrinks. They would remain black because they shrank so small atmospheric conditions does not heat them up.
This...
I just came across a documentary where I learned that anti-matter actually seems to be produced in what's being referred to as 'anti-matter fountains' that is to be found close to the centre of the galaxy. There seems to be a great deal of unsolved mysteries surrounding the phenomena, though, so...