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Chemical compounds discovered in a mosquito fossil from Montana offer scientists clues to what the very old insect ate before it died. The bug's final blood meal was likely from a bird, researchers say, and could lead to other hints about ancient Earth.
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Scientists have figured out how DEET repels mosquitoes. The finding has led the researchers to candidate repellents that are safer and cheaper than DEET and may provide new weapons against mosquito-borne scourges, such as malaria and dengue fever.