Winner of the 1986 Nobel Prize in Chemistry, University of Toronto professor John Polanyi delivers his 2002 lecture on the world that science has built.

Janice Stein on the ethics of responsibility and accountability.

Big Ideas offers lectures on a variety of thought-provoking topics which range across politics, culture, economics, art history, science.... By nature of its lecture format, pacing and inquisitive approach, it is the antithesis of the prevailing sound-bite television norm. The simple, bold concept is a victory of substance over style.