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Sharks on Twitter? GPS tags send alerts to swimmers

There's a new tool to prevent shark attacks at beaches in western Australia. The sharks are on Twitter. Jonathan Samuels, of Sky News, shows how sharks are tweeting out warnings in... More There's a new tool to prevent shark attacks at beaches in western Australia. The sharks are on Twitter. Jonathan Samuels, of Sky News, shows how sharks are tweeting out warnings in real time. Less

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