Q: How do they put that very small hole in a hypodermic needle? A: Actually they don’t. The needle is built around the hole. Although some needles are manufactured by other methods, the most common ...
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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 ...
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