Mobile

Researchers have created a battery-free phone that is powered by sunlight

Instead of batteries, a new cell phone harvests the few microwatts of power it needs from a different source: ambient radio signals or light. Researchers were also able to make Skype calls using the battery-free phone, demonstrating that the prototype—made of commercial, off-the-shelf components—can receive…

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How much screen time is too much?

In today’s media-rich world (or media-saturated, depending on your view), one rarely has to look far to find parents concerned about the ways that kids engage with technology. Recently, managing “screen time” seems to be on everyone’s mind – particularly during these summer months when…

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