What Is 'Copenhagen' Trying to Tell Us? By Gerald Holton, Gerald Holton is the author of, most recently, "Einstein, History, and Other Passions." He is Mallinckrodt professor of physics and professor of the history of science emeritus at Harvard University
Send in the Marines to End Argument Over an O.C. Airport By John Graham, John Graham is a professor of international business at the Graduate School of Management at UC Irvine. He recently was the Democratic candidate for Congress in the 47th congressional district
Our Divide Is Social, Not Political By William Schneider, William Schneider, a contributing editor to Opinion, is a political analyst at CNN
The Testing Obsession By Howard Gardner, Howard Gardner, Hobbs professor of cognition and education at the Harvard Graduate School of Education, is the author of "The Disciplined Mind" (Penguin Putnam, 2000)
Douglass, Not Lincoln, Bolsters GOP By Gregory Stephens, Gregory Stephens, a visiting assistant professor of human relations at the University of Oklahoma, is the author of "On Racial Frontiers: The New Culture of Frederick Douglass, Ralph Ellison and Bob Marley."
International Mission Is Now a Mockery of Democratic Principles By Ted Galen Carpenter, Ted Galen Carpenter is vice president for defense and foreign policy studies at the Cato Institute and the editor of "NATO's Empty Victory: A Post-Mortem on the Balkan War."
Dulce Maria Sauri By Sergio Munoz, Sergio Munoz is a Times editorial writer
Quest for the Perfect Human Has Severe Flaws By Allen J. Wilcox, Allen J. Wilcox is director of epidemiology at the National Institute of Environmental Health Sciences, one of the National Institutes of Health
President for Our Dumbed-Down Times By Doug Gamble, Doug Gamble has written humor and speech material for Republicans, including presidents Reagan and Bush
And You Think Air Travel Is Awful Now By Robert Ditchey, Robert Ditchey, a graduate of the U.S. Naval Academy, is a former Navy pilot. He is one of the founders of America West Airlines