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Well it is said that during the Big Bang, things were created in pairs: one matter and one anti-matter. I think its a part of the Big-Bang Theory.

It is also said that matter + anti-matter - Energy

Then shouldn't it be so that there would have been no matter or antimatter in existence now since all of them should have reacted to form pure Energy. I mean how were we created then?

And also where are all the antimatter gone now? Are they still reacting with us?

Thanks

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Matter and antimatter aren't perfectly symmetric, when following the "forward" direction of time. This is commonly called charge-parity violation. It's assumed, that this asymmetry caused an excess of matter in the early stages of the Universe after the Big Bang, annihilating almost all antimatter, and leaving behind matter.

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  • $\begingroup$ So where are they now? If you're still here this should be still eating away matter. $\endgroup$ – NeilRoy Oct 6 '14 at 17:06
  • $\begingroup$ Thus far, no indication for anti-stars have been found, although detectors have looked for atomic anti-nuclei in cosmic rays. But it has been considered, that antimatter may form temporarily on some neutron stars. After contact with matter, antimatter is annihilated in a gamma flash, "eating" matter. Antimatter forms from high-energy gamma rays hitting matter. Due to the usual presence of matter this antimatter will be short-lived. But one cannot rule out, that it can escape sometimes, and live until an encounter with matter. $\endgroup$ – Gerald Oct 6 '14 at 17:30

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