The Daily Show recently parodied the recent widespread concern that our zoadiac signs may have shifted.

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Nevermind the question about why this old news is news now.  The real question should be: why haven't people figured out yet that there are not twelve or thirteen signs, there's one.  Signs may be mystical but truth is in the metadata, which you can see clearly thanks to this awesome visualization and analysis in the link below:

http://www.informationisbeautiful.net/2011/horoscoped/