Facebook has expanded its new Trending feature, introduced in January, to cover mobile devices. It rolls out today and is available to US Facebook members for the Web and Android. An iOS version and support in other countries is coming soon, according to a company blog post. Trending was launched to help people discover hot topics under public online discussion, and it seems only logical for this functionality to be available on-the-go. Facebook says that the new feature lets you explore material from disparate sources and different perspectives. When you tap on a Trending topic, there is an organized list of discussions from five different angles. For…
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