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08/24/2019
08/23/2019
08/22/2019
Nature
How Sharks React to Magnets - YouTube - He demonstrated that effect in a seaside pen in the Bahamas. His field assistant, T. J. Ostendorf, captured a small lemon shark and slowly rotated it onto its back, underwater. That put the shark into a sleep-like state. Then Stroud took a magnet and spun it as he moved it toward the shark. The shark immediately bent away from the magnet — “like it’s another magnet,” Stroud said... Sharks possess electrical sensors, called the ampullae of Lorenzini, that look like tiny freckles on their snouts. Biologists believe sharks use these sensors to detect the heartbeats of their prey and to navigate using the Earth’s magnetic field. Stroud suspects the spinning magnet overwhelms those electrical sensors.
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