Who discovered x-ray?
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M$3 Answers
http://en.wikipedia.org/wiki/Wilhelm_Conrad_R%C3%B6ntgen
http://en.wikipedia.org/wiki/X-ray
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M$
just kidding
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M$You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
