Smart fishing hook uses magnets to repel sharks

US scientist Eric Stroud has invented a special kind of hook coated with rare-earth metals that he says acts as shark repellent. It's believed that sharks use what's called the Ampullae of Lorenzini, jelly-filled pores on a shark's snout that sense electricity. Such a tool would not only protect humans from shark bites, but also protect sharks from accidentally being caught by humans fishing for tuna. Source: BBC