Thoreau, Leopold and climate change

Old journals that recorded events in phenology — the first spring blooms on flowers, the migrations of waterfowl, when lakes freeze up in the winter and when the ice goes out in the spring — increasingly are being consulted by modern scientists seeking historical records of climate change. Read or listen to a National Public Radio report on research that looks at the writings of Henry David Thoreau and Aldo Leopold. Read three articles about the same kind of research in the Freshwater Society’s April 2010 Facets of Freshwater newsletter.