If you happen to be near San Francisco next February 1st to 6th 2020, there will be articles by me once again in the daily in-house magazine of the Photonics West technology conference happening at the Moscone Center. This year that includes talking to a company developing ways to let your cell phone tell if it’s looking at signs of cancer, an advance which has as much to do with developments in data handling as the camera; and another about tissue elastography, where physically prodding a suspected disease site can tell you a lot about what might be wrong. Plus an article on metamaterials, a class of substance which might soon be worth around $30 billion, so it would be good to understand why they do what they do. Eventually the conference magazines will be archived here on the publisher’s Optics.org site.