SELINSGROVE, Pennsylvania, Aug. 8 (TNSres) -- Susquehanna University issued the following news: No matter the passage of time, man's imprint on the environment is difficult to erase, whether it occurred decades, centuries or millennia ago. If you were to get a bird's eye view of the Susquehanna River, you might see something known as a fish weir. The long V-shaped walls were built of stacked rocks by Native Americans and early European settlers to trap fish. Jennifer Elick, associate professor  more