What do trains, red blood cells and snowboarding have in common? More than you might think according to scientists who hope to develop a new type of train track based on lessons they have learned from the flow of blood through the body and experiments with a snowboarder. Sheldon Weinbaum and colleagues at the City College of New York claim that a track made of goose feathers is capable of supporting the weight of a moving train (Phys. Rev. Lett. 93 194501).
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