dehammer there is/was no "in" and/or "out" and I can't think of a single serious proposal in physics that corresponds with your statement.

evil:
Matter and antimatter are NOT complete opposites. There is a lot of support for the proposition that the differences, however small, were enough that more matter was created. For more information on this check out:
http://www.llnl.gov/str/VanBib.html
http://www2.slac.stanford.edu/vvc/experiments/bfactory.html

DA Morgan