Coloured scanning electron micrograph (SEM) of a hooks and loops fastener. It is a two-sheet material used to fasten clothes and other fabrics. One sheet consists of hooks (seen here), the other of loops (not seen). When the two materials are pushed together the hooks attach to the loops, forming a secure bond, but one that can easily be undone. Magnification: x15 when printed at 10 centimetres tall.
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