National Humanities Center
National Humanities Center: Teacher Serve: History With Fire in Its Eye: An Introduction to Fire in America
This site from the National Humanities Center provides an interesting look at the history of fire in America, how we use it to control natural resources and how it controls us.
US Geological Survey
Lake Baikal: A Touchstone for Global Change
This site is an interesting article about Lake Baikal in Russia. This unique lake is helping scientists to learn more about the patterns of ecological change in the world and about the history of the world.