When Europeans first arrived in North America, the landscape was much different. Instead of free-flowing streams descending from high elevation to the sea, the flow of water was pooled from the Piedmont to the lowlands, like pearls on a string. Beavers created the pearly ponds for themselves but all the creatures benefited. So, the lay of the land we know today is not what our forefathers laid eyes one 500 years ago. Read this article on Discovery News.