UC Davis researchers have developed a method for detecting opioid drugs and drug metabolites in breath. The test could be useful for management of patients with chronic pain, as well as for detecting ...

(CNN) -- As a growing number of states legalize cannabis, health officials are increasingly sounding the alarm for technology that can quickly determine when drivers are stoned. A solution for ...

Dan was a writer on CNET's How-To and Thought Leadership teams. His byline has appeared in The New York Times, Newsweek, NBC News, Architectural Digest and elsewhere. He is a crossword junkie and is ...