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Nature
Sleek shapes in birds & fish
animals
dolphin
swordfish
fish plan view
World's fastest bird: perigrine falcon,257-mph fully tucked-in in freefall desent.The bird's disruption to the surrounding air is virtually...
Dolphins have drag coefficients on the order of Cd0.05
Awkward-looking Emperor penguine has drag coefficient of Cd0.10


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