TechKnow 133: The science of e-cigarettes

Join "TechKnow" contributors Phil Torres, Crystal Dilworth and Kosta Grammatis as they explore scientific innovations and their impact on our lives. On the 50th anniversary of the Surgeon General's first warning that cigarettes are linked to cancer, Crystal reports on how e-cigarette makers are using similar strategies to market to youth—and how the first scientific studies are showing dangerous impacts of e-cigs. Plus Phil meets Sarah Parcak, a space archaeologist who uses satellites to uncover hidden ruins.