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Sharks use Earth’s magnetic fields as a map when making long-distance migrations, scientists say – ABC News

Sharks are the ocean’s world travellers, and now scientists have found they use the Earth’s magnetic fields to navigate.

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Sharks are the ocean’s world travellers, swimming thousands of kilometres a year to their favoured locations.
But how do they pull off these impressive feats of navigation without looking out for landmarks?
Key points:

  • Sharks swim vast distances, with many returning to the same locations every year 
  • US researchers have found sharks use magnetic fields to orient themselves towards their preferred site
  • Their magnetic navigation could explain why sharks from the same species are genetically distinct…

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