Signal basically amounts to a new interface for a Twitter feed filter, strictly limited to professionals.

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"The project should have a high chance of success - a check a few days later found that the moved mussels had opened up (started to filter feed), a sign that they were happy in their new locations, " he said.

BBC: NEWS | UK | Scotland | Rare mussels are moved for safety

One frustration we have when looking at our normal Facebook news feed is that there's no easy way to filter out entries by priority.

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With a huge flow of information from many sources, some sort of activity stream filter is needed so that the amount of information flowing through a news feed does not become overwhelming and unmanageable.

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After learning the results of a men's diving event on Monday, Ryan Sullivan used TweetDeck, an application owned by Twitter, to filter out the words "Olympic, " "Olympics, " and "London2012" from his feed.

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