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International Space Station following most recent upgrade. Credit: STS-119 Shuttle Crew, NASA.

Reforming Healthcare Reform: Arnold Relman, a retired M.D. and the former editor-in-chief of the New England Journal of Medicine, explains why he thinks President Obama's healthcare reform attempts will fail, and what he thinks needs to be done. (first broadcast Friday, July 10, 2009)

The Heart of Power: A new book examines how the health issues faced by past presidents influenced their healthcare policies. (first broadcast Friday, July 10, 2009)

Longevity Compound: A compound used in humans to prevent rejection of organ transplants can significantly extend the lifespan of mice. (first broadcast Friday, July 10, 2009)

Snacks, Overeating, and Sensory Science: Got a weakness for chocolate chip cookies? Kettle chips? Pizza? Ira talks with former FDA commissioner David Kessler about how tasty foods change your brain, and how the food industry designs the snacks you crave. (first broadcast Friday, July 10, 2009)

A New Type Of Black Hole : Researchers may have discovered a new type of black hole, a finding that would mean the massive gravity sinks can exist in a 'medium' size. (first broadcast Friday, July 3, 2009)

Some Projects to Try on Your Summer Vacation (Or Perhaps Not): We'll give you some ideas for safe -- and not so safe -- science experiments that you may be tempted to try at home. (first broadcast Friday, July 3, 2009)

The Disappearing Mississippi Delta: Rising sea levels and not enough sediment replenishment may make much of the Mississippi Delta 'drown' by the year 2100, according to a new study. (first broadcast Friday, July 3, 2009)

A Conversation with Ocean Explorer Bob Ballard: In this segment, Ira talks with undersea explorer Robert Ballard about his life and work, both in exploration and education. (first broadcast Friday, July 3, 2009)

Hydrogen Storage in Chicken Feathers?: Researchers say they've come up with a new material for storing hydrogen fuel -- carbonized chicken feathers. (first broadcast Friday, June 26, 2009)

Wind Energy Potential: A new report says wind turbines have the potential to supply all the world's energy needs. (first broadcast Friday, June 26, 2009)

Oil from Diatoms: Is it possible to engineer diatoms to secrete oil? (first broadcast Friday, June 26, 2009)

Summer Science Movies: We'll talk about the art and science of several films out this summer, from documentaries chronicling an astronomy project, to a mass-market blockbuster featuring antimatter in a supporting role. (first broadcast Friday, June 26, 2009)

Health Care Reform: The White House is trying to push forward its plans for reform of the US health care system, with President Obama giving a speech to the American Medical Association outlining parts of his proposals. In this hour, we'll try to sort out the options. (first broadcast Friday, June 19, 2009)

Summer Sky Guide: Summer nights are made for stargazing. We'll get a guide to what to look for in the skies in the months ahead. (first broadcast Friday, June 19, 2009)