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In this Wednesday, June 3, 2009 file photo, adult mosquitoes are seen through a fluorescence microscope at the University of Maryland Biotechnology Institute's Insect Transformation Facility in Rockville, Md.. Scientists may have figured out one reason why people infected with malaria are so tempting to mosquitoes who bite them and then spread the disease to others: odor. Researchers at Stockholm University released hundreds of mosquitoes into a Y-shaped tube that offered them two choices: human blood with a cellular substance found in malaria-infected people or regular human blood; the compound has a particular scent discernible only to mosquitoes that apparently makes it more enticing. About 95 percent of the mosquitoes dove straight into the blood with the malaria molecule. The study was published online Thursday, Feb. 9, 2017 in the journal, Science. (Photo by Jacquelyn Martin/AP Photo)
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