Velocity Alert: The latest 'Doctor Who' sonic screwdriver is finally up for sale

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THIS STORY IS ABOUT TO GO VIRAL

The latest 'Doctor Who' sonic screwdriver is finally up for sale The sonic screwdriver is back... in the hands of fans. How does Mashable know what's going viral? Mashable built a system called Velocity, which scours the social web, collecting lots and lots of data around how people are engaging with published articles. It then pulls all of that data back to Mashable, dumps it into our own predictive engine, and predicts which articles are about to go viral. Read more at Mashable.com ▶ Mashable, Inc. is a Delaware Corporation. P.O. Box 64 New York, NY, 10159-0064

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