I have written for many magazines over the years. Some are only in print, but these days most are both in print or on the Web, although many publications do not publish paper copies of everything on their web site. Here's a sampling of where I have had articles published in recent years.

New Scientist, a global weekly magazine and web site covering science and technology. I've been writing for them since the 1980s, covering fossils, earth and planetary science, climate and the environment, and technology including lasers and optics. I am listed as a consultant on the magazine's masthead.
Laser Focus World, a laser industry trade magazine. I write news stories and features and give tutorial webcasts on lasers and photonics. You can find a list of my articles here. 
IEEE Spectrum, published by the Institute of Electrical and Electronic Engineers, where write blogs, news and features. My feature on "Great Leaps of Light" in IEEE Spectrum won a Jesse H. Neal Award. Several years back, I explained  why voice quality of mobile phones is so bad and how it can be fixed. 
Optics & Photonics News, published by Optica (formerly the Optical Society of America), where I have explored the "twilight zone" of night vision and LED street lights,  Cutting Edge Cinema, and written about the history of optics and lasers.
Photonics Focus, the member publication of SPIE, where I have written about pioneers in photonics and new technology.
Nature, the weekly science journal, where I have written news and feature stories and features for the Outlook section  both Nature and other journals in the Nature family.
Sky & Telescope magazine, where I report news and write features on planetary science and astronomy

I have posted a list of feature articles I have written since 2014 with links to those available online. I will bring it up to date once I have this web site up and running.