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Nature 408, 777-778 (14 December 2000) | doi:10.1038/35048643

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Swimming in Flatsea

Greg Huber

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Some of the simplest questions are the hardest to answer. Why flags flap is a long-standing puzzle that becomes easier to solve in a two-dimensional world.

Swimming strings and wind-blown filaments are nowhere to be found in the two-dimensional world created by Edwin Abbott in his sci-fi classic Flatland 1. But on page 835 of this issue, Zhang et al.2 show that at least one visitor to this world, from the even more reduced Lineland, has a few tricks up its slender sleeve.