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Are any mosquitoes evolving with delayed-action stings or reduced sting secretions so they can drink blood without the threat of imminent death?

I’d like to say it was all hard work, skill, and perfect timing.In your article about housework ("Germ warfare", 14 January), you said that after washing dishes we should "rinse with plenty of water, preferably hot". Wouldn't it save money if they were rinsed with the cold water that comes directly from the mains?Mosquito bites frequently induce a sharp sting in people and some animals, with severe evolutionary consequences for the mosquito when it gets swatted. The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.Libby received the Nobel Prize in Chemistry for his work in 1960.