A retired University of Arizona educator is making science available for kids learning at home. Optical Science professor emeritus Richard Powell talks about the challenge of writing a physics textbook that can be used by families dedicated to homeschooling education.

Polluted ground and water in the Arctic have gone unnoticed for decades. University of Arizona environmental health scientist Frank von Hippel is working with Native American tribes in Alaska to locate and clean up pollution from military installations dating back to the Cold War.