After Hours

Desktop Wallpaper: The spectacle of underwater photography

Gray’s Reef

Soft corals, sponges, and fishes that are typical inhabitants of Gray’s Reef.

Credit: NOAA


Mark W. Kaelin has been writing and editing stories about the IT industry, gadgets, finance, accounting, and tech-life for more than 25 years. Most recently, he has been a regular contributor to,, and TechRepublic.