Great Moments in Google: Try Googling "American scientists" and see what Google gives you: http://www.unz.com/isteve/great-moments-in-google-american-inventors/ …pic.twitter.com/GFjDYIavIv
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Based on this I'd say the root cause is the algorithm but that Google selectively cleans it up search results that are not consistent with their ideology. Not good. Politics should have no role in search.
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