00:00When a porcupine quill pierces skin and muscle, its tiny barbs concentrate pressure into sharp
00:06points, allowing it to slip in with minimal resistance. Once embedded, those barbs expand
00:13outward, catching on surrounding fibers and making removal up to four times more difficult.
00:20Inspired by this natural design, scientists have engineered medical needles that mimic
00:25the same mechanism. These biomimetic needles glide into tissue smoothly, but resist slipping
00:32back out, providing a more secure hold. This innovation is especially useful in procedures
00:38requiring stitches or precise anchoring, offering improved stability while reducing the force
00:44needed for insertion.
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