Video: Pigeons Found to Have "GPS" cells in Brain

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Researchers at Baylor College of Medicine found pigeons have an internal "GPS" based on the earth's magnetic field. These birds appear to have a group of 53 cells that react to the angle and intensity of the magnetic field via a sensor that could be located in the inner ear. Scientists say that birds as well as other animals can sense the Earth's magnetic force and change migration routes accordingly.