How can devices, environments, or computer programs be designed to change how people behave? We'll talk about the field of 'persuasive technology.

Join Ira and guests in this segment for a look at efforts to track down the source of high-energy cosmic rays.

Can robots be trusted to safely drive cars on city streets? We'll talk about a recent robot road test.

We'll get the latest on the eruption of Alaska's Mount Redoubt volcano.

A new museum exhibition looks at the battling histories of explorers Roald Amundsen and Robert Falcon Scott.

It swims and can lead a school of fish -- but it's a robot.

Climate scientist Stephen Schneider passed away this week at the age of 65. We'll talk about his life and accomplishments.

Artist and author Lauren Redniss talks about her new book, Radioactive, an illustrated biography of the Curies and a look at their complicated legacy.

How reliable is our national electrical distribution system - and what can be done to make it better?

We'll take a look at Eodromaeus, a newly-discovered small predator that lived about 230 million years ago.

LTE, WiMax and HSPA+ networks are all being marketed as '4G' networks -- but how do they measure up?

We'll talk with one of the scientists behind a project that used a radio telescope to peer back millions of years in time and make observations of the magnetic field present in a distant proto-galaxy.

Sure, it's just frozen water, but what IS ice really?

Electronic music pioneer Thomas Dolby talks about his career in music and technology.

Can electronics makers collect and share your data without your consent?

A study suggests fat around the waistline poses the biggest risk for patients with heart disease.

The National Center for Science Education helps teachers keep pseudoscience out of the classroom.

Rocks collected recently in the Moroccan desert fell to Earth during a meteor shower last July.

A high-speed video camera is a must for biologist Sheila Patek.

American cancer patient gets the world's second synthetic trachea transplant.

Two projects aim to use innovative technology to turn renewable energy into power.

Cellphones and the Internet have democratized free speech, but what if governments shut off service?

This toilet floats. You have to see it to believe it. Learn how rainwater and human waste can be converted to plants and clean water in a paddle-boat-toilet. It's a zero-waste waste disposal system that's discussed in this video and...

We'll talk with the skipper of a bio-fueled powerboat named Earthrace, which just broke the record for circumnavigation of the globe. [17 mins. 48 secs.]