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We have known for years that many animals can somehow detect magnetic fields. Birds apparently use the Earth's magnetic field to navigate. Dogs can find a box containing a magnet better than they can find a similar box containing a treat. But humans, apparently, can not visualize magnetic fields without help. Several scientists from California, New Jersey and Japan have done experiments that seem to show that people's brains undergo changes when a magnetic field turns. If the document entitled "Geomagnetic field transduction, highlighted by alpha band activity in the human brain" is a little too much for you, take advantage of the Veritasium video below, which is much easier to badyze that document.
To see it work, a subject sits in a dark, insulated room with an electrode cap that captures his EEG. The study shows that different people have different sensitivity on the ground. In addition, capturing a magnetic field in an isolated room is different from capturing it on the sidewalk and using it to navigate.
However, there is evidence that this has shaped human cultures in the past. A number of human languages lack specific works for things like the front and the back and instead use cardinal directions like the north and the south.
If you really want to detect magnetic fields, it is best to implant a magnet in your finger. Again, you do not have to use your finger.
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