PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY
Sports footwear testing. Samples of a material for sports footwear, undergoing quality testing. The samples (brown) are held at either end by a clamp, and they can be twisted and put under strain to see if the material is good enough to be used for sports footwear. Photographed at the Adidas research centre in Scheinfeld, Germany.
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