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Originally Posted by TeleMad
If you mean with the naked eye, under non-controlled conditions, I doubt it. You can't see something unless it is non-microscopic. And to get something even as small as the smallest visible molecule would require having trillions (or whatever) anti-matter atoms bonded together. Before that much anti-matter could aggregate it would encounter normal matter and undergo mutual annihilation.
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Although I agree that it would be difficult to produce a sizeable hunk of antimatter and to manipulate it, espescially here on Earth, this doesn't mean that you wouldn't see a large hunk of it if you passed by one out in space.
Anyway, a small but visible speck could be manipulated in a vacuum if, for instance, it is electrically charged. Handle with care...
P. S. I'm not so sure about what I said Friday concerning polarization effects being inverted, I haven't really worked it out but EM conserves parity seperately and the electric dipole moments ought to count regarless of the single charges...
