1879年8月9日

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美国河流明轮蒸汽船“玛丽·鲍威尔”号

作者：萨宾·霍森菲尔德& 斯泰西·S·麦高

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Sabine Hossenfelder is a physicist and research fellow at the Frankfurt Institute for Advanced Studies in Germany. She currently works on dark matter and the foundations of quantum mechanics.

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Stacy S. McGaugh is an astrophysicist at Case Western Reserve University. His research focuses on low-surface-brightness galaxies, which provide strong tests of modified gravity and dark matter.

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SA Supplements Vol 8 Issue 188suppThis article was originally published with the title “The American River Paddle Wheel Steamboat ' Mary Powell'” in SA Supplements Vol. 8 No. 188supp (), p. 2989
doi:10.1038/scientificamerican08091879-2989bsupp
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