Facebook tests feature that makes it easier to creep on mutual friends

Facebook wants you to learn more about your mutual friends.
The social network is experimenting with a new feature called "Things in Common" that highlights details you have in common with your friends' friends.
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It's not clear how long the company has been testing the feature or if it plans to make it more widely available, but it offers an intriguing look at how Facebook is looking to boost users' interactions with one another. 
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