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The Rewards and Penalties of Polar Exploration, Multiple Engines for Passenger-carrying Aeroplanes and more

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Scientific American Magazine Vol 104 Issue 16This article was originally published with the title “The Rewards and Penalties of Polar Exploration, Multiple Engines for Passenger-carrying Aeroplanes, and more” in Scientific American Magazine Vol. 104 No. 16 (), p. 398
doi:10.1038/scientificamerican04221911-398