Lead author Bryan Keller told AFP the paper vindicates a decades-old theory about how the aquatic predators are able to migrate vast distances, swim in arrow-straight lines, and return to their precise point of origin.All these factors led scientists to believe that sharks -- like sea turtles and certain other species -- can glean their position and orientation using the magnetic field generated deep within our planet.
"This demonstrates that the sharks knows where 'home' is and can navigate back to it from a distant location." The device was used to simulate magnetic field conditions that corresponded to different locations on Earth, hundreds of kilometers from where the bonnetheads were caught. They didn't orient themselves in any direction when the coil told them they were already at their home.He added that it was unlikely that bonnetheads evolved this ability independently of other sharks, and the finding illuminated impressive feats among its cousin species.
پاکستان تازہ ترین خبریں, پاکستان عنوانات
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