Clean Elections State Treasurer Debate

The two candidates running for Arizona State Treasurer discuss issues related to the state budget and finances in a debate sponsored by the Citizens Clean Elections Commission. The candidates include Republican Kimberly Yee, former state senate majority leader, and Democrat Mark Manoil, an attorney.

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In this segment:

Republican Kimberly Yee, who is the state senate majority leader, and Democrat Mark Manoil, an attorney

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Nova "High-Risk, High-Rise"

Skyscrapers are gleaming symbols of prestige, and an ingenious way to save space in dense urban areas. But as buildings rise ever higher, what are the risks of these architectural behemoths? Do we truly know how they will hold up in earthquakes, fires, and other potential disasters? What have--or haven’t—we learned from past tragedies?

Extra Life: A Short History of Living Longer

Discover the little-known story of the innovations in science and medicine that doubled the human lifespan in less than a century.

Life at the Waterhole

Dr. M. Sanjayan and his team uncover the complex dynamic of this bustling oasis where elephants, lions and leopards compete for water.