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This week on ‘TechKnow’

The science behind e-cigarettes SATURDAY 7:30E/4:30P

On the 50th anniversary of the Surgeon General's first warning that cigarettes are linked to cancer, "TechKnow" contributor Crystal Dilworth reports on new scientific studies on e-cigarettes—and how e-cig makers are using similar marketing strategies to target youth. Plus Phil meets a space archaeologist who uses satellites to uncover hidden ruins.

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FROM LAST WEEK'S SHOW

More on voice banking, heartbeat finders, and oysters


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TechKnow is a weekly series that explores how the latest scientific discoveries are changing our lives. Our geeky contributors use their diverse backgrounds in science and technology to expose the controversies and celebrate innovative breakthroughs in the U.S. and around the world.