(MD) (Natural History Society of Maryland) Trees are invaluable record-keepers of the past. Since their annual growth is intrinsically related to a combination of environmental factors, tree ring data can be used like a Rosetta Stone. Dr. Karen King will demonstrate how her research in biogeography and climate change is informed by tree-ring data. We will focus on regional examples from western Maryland to learn what tree rings can tell us about temperature, hydroclimate, and ecological variability.