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  • [music playing]

  • NARRATOR: In Bimini, Bahamas, a team of experts

  • are hoping to entice a couple sharks for an experiment

  • and get more than they bargained for.

  • [music playing]

  • They're testing if sharks can detect magnetic fields.

  • The answer could unlock a major mystery about how sharks find

  • far-flung, food-rich volcanic islands

  • and whether the island's naturally magnetic lava

  • rock is involved.

  • For this open water experiment, they

  • arranged three powerful magnets to the right

  • and three non-magnetic controls to the left.

  • A big hammerhead glides over the aluminum control

  • without a glance and heads for the magnets.

  • Hammerheads ignore the aluminum, clustering around the magnets.

  • The nurse sharks have a greater response.

  • Nurse sharks are drawn to the magnets.

  • The sharks are agitated, possibly by the magnets.

  • [music playing]

  • That was fantastic.

  • That was great.

  • So many hammerheads down there, all over the place.

  • A bunch of nurse sharks.

  • The nurse sharks were playing at the magnets.

  • Really neat dive all around.

  • Yeah so that dive was crazy.

  • We had nine hammerheads there.

  • We got what seemed like countless nurse sharks.

  • What we saw was that both the nurse

  • sharks and the hammerheads did respond to the magnets.

  • So what we can take away from that

  • is that those weak magnetic fields that are locked

  • in volcanic rock are something that the sharks

  • could detect and may be able to use in navigation.

[music playing]

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B2 nurse magnetic detect music playing volcanic aluminum

Can Sharks Detect Magnetic Fields? | Sharkcano

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    林宜悉 posted on 2020/11/03
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