But the message must contain a specific series of Arabic characters, so you're likely to receive it only as a prank. And there are ways to resolve the problem.
Ceres appears to have a pair of cosmic headlights reflecting the sun. As NASA's Dawn spacecraft approaches, they're looking smaller, but no less mysterious.
Two years ago, the South by Southwest conference in Austin, Texas, was sprinkled with people wearing Google's smart eyewear. This year, it seemed like no one was wearing it. Except me.
The company's bubble-shaped autonomous vehicles will soon take to the streets of Google's hometown to see how they fare in real traffic -- and how we respond.
Google's already gotten its feet wet in virtual and augmented reality. Could this year be the next big step?
Like its predecessor, the sub-$100 MHD 2.0 is a basic, but good waterproof point-and-shoot video camera and nothing more.
Microsoft dazzles developers with demos of its HoloLens at Build 2015.
Microsoft has released a new app for Android devices that will let you turn any video into a smooth hyperlapse.
Microsoft demonstrates how HoloLens could one day be used in industries like architecture, medicine and education.
The TV channel is launching a show called "American Genius" that's about bitter rivalries, including the Wright Brothers vs. Curtiss, Colt vs. Wesson and Oppenheimer vs. Heisenberg.