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Researchers in the US have discovered that mosquitoes have a sharp sense of smell. They can detect their meal even before setting their eyes on their prey. Jeff Riffell, a biologist at the University of Washington, and a scientist involved in the research has been speaking to Â鶹Éç Newsday (Photo: The body of a female mosquito fills up and balloons as she sucks blood from the photographer's hand. Credit: Tom Ervin/Getty Images)