So where is all this stuff? I don't see any around here.

Believe it or nor the the answer is complex in its simplicity. Huh?

According to the quantum theories developed to describe anti-particles, you cannot have matter without an equal quantity of anti-matter. The two are created in pairs out of pure energy. Thus, there should be an equal amount of both in the universe. Do you see the problem? All the stuff around here is just ordinary matter.

So where is all the excess anti-matter located?

Well, you could conceive of an entire planet, star, solar system, or even a galaxy made totally of anti-matter. Theoretically, the planet would "appear" no different than some other planet. For this reason, astrophysicists have searched for anti-matter galaxies and even larger structures by looking for the violent activity that would occur at the boundaries, where annihilations with matter particles would create abundant amounts of gamma rays. But no such structures have been identified thus far, even within searches billions of light years in extent. It appears we live in a universe completely dominated by matter.

Galaxy Zeugirdor	Anti-Galaxy Zeugirdor

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The theoretical galaxy Zeugirdor looks exactly the same regardless of its matter type, right? Now move your mouse over the anti-galaxy. The glow appearing along the rim would actually be gamma rays generated by annihilations with matter.

Above all, if matter and anti-matter are indeed exact opposites, and they were created in equal amounts, then we would not be here now. All matter would have annihilated with all anti-matter. Hence, there must be some sort of bias towards matter--or our theories of creation and matter need major revision.

I don't get it. What do you mean bias? Ah, good question...next section please.