An expert is a man who has made all the mistakes which can be made, in a narrow field.

Scientists
Niels Bohr
Danish physicist born in 1885 who proposed the Bohr atomic model and won the 1922 Nobel Prize. He shaped the Copenhagen interpretation of quantum mechanics and mentored a generation of physicists.
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Niels Bohr's Other Quotes
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The duty of the individual is to do what he does best.
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