Discusses black holes, what they are, why they exist, and the possible consequences they pose for our universe.

Presents the background and the ensuing complications of this "War Without an End."

Analyzes the political upheaval which has resulted in El Salvador's civil war, examines the role of the United States in the conflict, and considers the future of this Central American country.

Examines the direct and indirect effects of acid rain, how it is formed, how it is being studied, who are the culprits in the creation of this very damaging ecological problem, and what citizens and the government can do to alleviate it.

Describes the history of conflict among Middle Eastern tribes and nations before and since the birth of Islam.

Explores such critical issues as the changing economic status of the United States and Western Europe, the global role of NATO, the different views of detente and the Soviet threat held by Americans and Europeans, and the possible future of the NATO alliance.