Researchers Say They Have Shark Repellent That 'really Works' By Ian James/Associated Press SAN JUAN, Puerto Rico (AP) - Excited by the scent of blood, a dozen sharks dart about in a frenzy as a researcher dips a pole in the sea and squirts out a clear, yellowish substance. Within seconds, the sharks jerk their snouts away and vanish. Researchers say they finally have found a potent repellent to drive away sharks, after testing off Bimini island in the Bahamas. It's a goal that's eluded scientists for decades. If proven effective, the repellent one day might protect divers, surfers and...