Zothecula writes: With tens of thousands of miles of coastline and a recent spike in shark attacks, Australia is exploring some pretty imaginative approaches to ensuring the safety of its beachgoers. Magnetic barriers and shark-tracking phone apps are a few of the tech ideas that have been floated, and the state of New South Wales is now turning to drones to help do the job. It has launched a trial of unmanned shark-spotting aircraft, which will survey the coastline for predators lurking in shallow waters.
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