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Bunch-Hellemans, Recognizing the power of steam
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Bunch-Hellemans, The nature of light
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Bunch-Hellemans, The advent of electricity
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Bunch-Hellemans, Immutability of the heavens
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Bunch-Hellemans, The Almagest – In search of geometrical perfection
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Bunch-Hellemans, Why was the steam engine not used in Antiquity