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Magnetic Fish Hooks Save Sharks

It sounds like a plot device from a comic book: a simple substance that can make the powerful weak. But it's not kryptonite. An enterprising chemist says he's found a substance—several, in fact—that work against some of the most fearsome predators in the ocean. And he wants to use his discovery to protect them.

ByAri DanielNova

National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting, and PBS viewers. Additional funding is provided by the NOVA Science Trust.