Geeky Rare-Earth Magnets Repel Sharks

Geeky Rare-Earth Magnets Repel Sharks: "Divers and swimmers may thrill to the idea of shark safeguards. However, before you rush out to buy neodymium magnets to create your own shark-repelling gear, Herrmann cautions that the magnets appear to have an effective range of only 10 inches. Also, you'd need to align the magnetic poles outward and keep the magnets from clicking together, and once you had the necessary 10 to 20 pounds of magnets all over your body, you'd sink. So, at a cost of about $5 a magnet, you could theoretically turn yourself into a $400 shark-safe anchor at the bottom of the sea."