An American chemist says he's found a substance – several, in fact – that can repel some of the most fearsome predators in the ocean. He wants to use his discovery to protect them, and us.
He watched how the sharks fed, swam, and behaved. Then, one day, he accidentally dropped a large magnet from his workbench. He noticed some small nurse sharks dart away.
Stroud thinks that was the moment he discovered that magnets repel sharks.
He demonstrates the effect at the Bimini Biological Field Station in the Bahamas. He stands waist-deep in water, just offshore, in a fenced-in pen in the sea. Several young Lemon sharks glide around the perimeter. One of Stroud's assistants captures one of them and slowly rotates it onto its back underwater. This puts the shark into a sleep-like state.
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