An eccentric Russian scientists' quixotic quest to recreate a vanished ice age ecosystem and save the world from a catastrophic global warming feedback loop.

Documents the journey of the Solar Impulse—the first solar-powered, round-the-world flight—demonstrating the tremendous potential of renewable energy sources.

Threats to water quality in the Colorado Rockies.

Tells a poignant chapter in the historic struggle to secure equal and adequate access to healthcare for all Americans

A non-partisan look at the consequences of big-money campaign donations and a Capitol overrun by lobbyists.

From Papua New Guinea to the tar sands of Alberta, Canada, native people fight the loss of land, water, and health to mining and oil industries.

Man-made chemicals may be programming us to be fat - before we're even born.

An investigation into how war games, worst-case scenarios, complex systems, and networked media produce the very crises they seek to model, predict and report.

Philip Zimbardo and Daniel Ellsberg discuss why some people are willing to take courageous nonviolent action in defense of ethical principles.