Global Climate Change Update: Scientists say carbon dioxide levels in our atmosphere are shooting up faster than anyone predicted. What does that mean for climate change -- and for plans to limit carbon emissions? (first broadcast Friday, November 2, 2007)

Air Travel Safety Study: A NASA study found that serious safety problems, including aircraft near collisions and runway interference, occur far more often in the aviation industry than previously recognized. (first broadcast Friday, November 2, 2007)

Building a Brainbow: Researchers have developed a technique that takes brain mapping to a new level, allowing them to label individual neurons in the brain in different colors. (first broadcast Friday, November 2, 2007)

Good Calories, Bad Calories?: Which is the true dietary villain -- cholesterol or carbohydrates? In this segment, Ira talks with science writer Gary Taubes about his new book, 'Good Calories, Bad Calories.' (first broadcast Friday, November 2, 2007)

Cosmic Rays Tracked: Join Ira and guests in this segment for a look at efforts to track down the source of high-energy cosmic rays. (first broadcast Friday, November 9, 2007)

Math and Science Education: Conventional wisdom says that U.S. students don't measure up well against students in many foreign countries when it comes to math and science skills. But is that really true? (first broadcast Friday, November 9, 2007)

Supervolcano on the Rise: The remnants of a supervolcano under Yellowstone National Park are on the rise -- though researchers say there's no cause for alarm. (first broadcast Friday, November 9, 2007)

Oliver Sacks - Musicophilia: How does music affect the brain? Join Ira in this segment for a conversation with neurologist and author Oliver Sacks about the brain and music. (first broadcast Friday, November 9, 2007)

DARPA Urban Challenge: Can robots be trusted to safely drive cars on city streets? We'll talk about a recent robot road test. (first broadcast Friday, November 9, 2007)

Politics and the Brain: What happens in your brain when you think about politics? We'll talk with a researcher using brain imaging techniques to map out voters' innermost feelings about the current crop of candidates. (first broadcast Friday, November 16, 2007)

Future of Phones: There are plenty of options for placing a call from point A to point B, with more arriving on the market every day. In this segment, Ira and guests try to sort out the future of phones. Will Google's entry into cell phone software simplify the market? (first broadcast Friday, November 16, 2007)

Hydrogen from a Bacterial Brew: Researchers have developed a more efficient way to extract hydrogen from biological materials using a bacterial fuel cell. (first broadcast Friday, November 16, 2007)

Monkey Clones and Stem Cells: Researchers report that they have been able to extract embryonic stem cells from cloned monkey embryos. (first broadcast Friday, November 16, 2007)

Michael Novacek and 'Terra': In this segment, Ira talks with Michael Novacek, paleontologist and curator at the American Museum of Natural History, about his new book 'Terra.' (first broadcast Friday, November 16, 2007)

Presidential Science Advisors: How important are a president's advisors when it comes to making decisions that deal with science and technology? (first broadcast Friday, November 16, 2007)

The World Without Us: What would the world be like if humans were to disappear from the planet? (first broadcast Friday, November 23, 2007)

Why is the Universe Right for Life?: How did our universe develop in such a way that we can exist? Is it by accident or design -- and is that a question science can answer? (first broadcast Friday, November 23, 2007)

The 2007 Ig Nobel Awards: It's time for our annual Thanksgiving holiday tradition -- highlights from this year's Ig Nobel awards ceremony. (first broadcast Friday, November 23, 2007)

Re-Wiring the Sense of Touch: Doctors have rewired the nerves of two amputees to restore the sensation of touch in a missing hand. The researchers hope the work will lead to better prosthetic devices. (first broadcast Friday, November 30, 2007)

Stress: You've survived the big family Thanksgiving get-together -- but now the winter holidays loom on the horizon. In this segment, we'll talk about stress, how it affects your health, and how you can de-stress for the holidays. (first broadcast Friday, November 30, 2007)

Green Energy at Google: In this segment, Ira talks with the 'alternative energy czar' for web giant Google about the company's plan to give a boost to green energy. (first broadcast Friday, November 30, 2007)

Stem Cells in Review: Last week researchers announced a significant advance in stem cell science, changing skin cells into cells that seem to behave like embryonic stem cells. Now that the dust has settled, we'll talk about the research and where the field goes from here. (first broadcast Friday, November 30, 2007)

Canadian Beef Imports: Canadian cattle up to 8 years old can now be imported into the U.S., according to rules that went into effect earlier this month. That has some health advocates worried. (first broadcast Friday, November 30, 2007)