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Philadelphia bans 3D-printed guns and Google Maps helps travelers escape airports.

Rachel Pincus
Rachel Pincus on November 27, 2013.

Instagram now hosts a new ad every day. AdAge

Twitter’s new age gate for alcohol brands is also a tool for gathering user info. The Verge

Google Maps now displays images of airports and train stations. The Next Web

Yahoo can’t get its own employees to use Yahoo Mail. Huffington Post

How Tinder solves critical problems with personal space. BBC

Ashton Kutcher’s event ticketing app YPlan reaches 500,000 users after a year. Telegraph

The White House crowdsources which turkey will be pardoned this year. Business Insider

Philadelphia has become the first city to ban 3D-printed guns. Fast Company

Blue light seems to have the benefits of caffeine. The Korea Times

Apple’s App Store now has spell checks and “fat finger correction.” TechCrunch

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