Tied up in knots: the tiny knotted robot could find applications in agriculture and reforestation. (Courtesy: Bella Ciervo/Penn Engineering) Researchers at the University of Pennsylvania and the ...
Leading edge Collisions between pencils found that no matter how sharp they were to begin with, their tips always developed a parabolic shape. (Courtesy: John Sebastian, Technical University of ...
Acrylic (PMMA) Hard, brittle, shiny, available in a wide range of colours Resists weather well, can be cut, folded and polished well, scratches easily, used for car lights, visors and baths High ...
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