Mosquito inspires near-painless hypodermic needle

Mosquitoes are perhaps useful for something after all, besides feeding frogs. Along with his colleagues at Osaka’s Kansai University, mechanical engineer Seiji Aoyagi has created an almost pain-free hypodermic needle that is based on a mosquito’s proboscis. Perhaps surprisingly, the needle’s patient-friendliness comes from the fact that its outer surface is jagged, not smooth.

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