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Facebook has ended its month-long experiment with the alternative News Feed feature, Explore, that was started in October 2017 in six countries. We constantly try out new features, design changes and ranking updates to understand how we can make Facebook better for everyone. Some of these changes -- Reactions, Live Video, and GIFs -- work well and go on to become globally available, Adam Mosseri, Head of News Feed, wrote in a blogpost on Thursday.