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Something Cool Underwater – and in the Air Too

Human powered submarines: [youtube=http://www.youtube.com/watch?v=xL8UCPPAWEQ&NR=1] Rather conventional seeming solutions, but nice anyway. This is a more out there attempt. A flapping submarine, like a ray. It doesn’t seem to go very much anywhere when one compares to the propeller ones: [youtube=http://www.youtube.com/watch?v=0yZd7ycB-xw] … Continue reading

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