Swimming dolphins don’t need to cheat

Swimming dolphins don’t need to cheat

Measurement finds no sign of long-predicted lack of power

By Susan Milius, 17:21 PM January 15, 2014

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Swimming dolphins generate thrust just fine and have no need to compensate for supposedly underpowered muscles.

That conclusion comes from using bubbles in a pool to study dolphin swimming, says Frank E. Fish of West Chester University in Pennsylvania.

The study contradicts a storied 1936 paper by Sir James Gray, who calculated that dolphins didn’t have the muscle to produce the thrust they need to swim as fast as they do. Called “Gray’s paradox,” the work raised hopes of learning...

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