PITTSBURGH, Pennsylvania, July 14 (TNSjou) -- The University of Pittsburgh issued the following news: * * * Why is it so hard to find DNA in bird poop? By Patrick Monahan For years, scientists talked about the problem. They swapped stories of failed projects, came up with explanations and hinted at it in published studies. Only this May did a team of microbiome researchers finally publish a paper asking the question directly: Why is it so hard to find DNA in bird poop? "There's all kinds of things you can do with feces, and mammalian fece more PR