After Hours

Desktop Wallpaper: The spectacle of underwater photography

Ochre sea stars

Ochre sea stars (Pisaster ochraceus) are voracious predators in the intertidal zone.

Credit: NOAA

About Mark Kaelin

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.

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