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EDITOR'S NOTE: Rudolf Schilder, assistant professor of entomology at Penn State University, took some time to explain why Pennsylvania residents are seeing so many dragonflies this month. He studies ...

Mercury pollution from power plants and mining operations can end up in our air and water. But it’s tricky to predict just how much of that environmental mercury will make its way into our food—and ...

A common green darner appeared like magic along the side of a street in my neighborhood. The dragonfly gets its name from its green thorax, the part of the insect’s body that's attached to the wings.

Research confirms dragonfly larvae as ''biosentinels'' to indicate mercury pollution and presents the first-ever survey of mercury pollution in the U.S. National Park System. A citizen science program ...