Articles with the keyword: 
sumsung submitted, created time 8 months 4 weeks (sciencenow.sciencemag.org)
Scientists have hit upon a way to spy on invasive wetland species without ever having to see them: They simply detect their DNA in the water. The technique works on bullfrogs, which are an invasive species outside of North America, and such DNA scans could eventually be used in rapid surveys of biodiversity. 
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