Support Provided ByLearn More

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

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