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- Sweet Confusion: Does high fructose corn syrup deserve such a bad rap?
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- Teens take home science gold: A low-cost, self-driving vehicle; battery alternatives and analyses of galaxy clusters claim top prizes at a global high school science competition
- Flagging loose bolts: “Smart alert washer” automatically flags when a nut is coming loose, warning of potential danger
- Pee is for power: The water in urine can be a source of hydrogen for electrical generators
LIFE IN SLOW LANE
View larger Version | In a 1976 lecture, the physicist E.M. Purcell illustrated how swimmers must contend with different forces at different scales. His doodles included, from left, comparing Reynolds numbers for a human, fish and microbe; showing how to calculate a Reynolds number; and examples of body designs and swimming maneuvers that microbes use to move through viscous fluids.
Credit: E.M. Purcell/American J. of Physics 41 (1) 311, copyright American Institute of Physics
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