Scientists have been researching how this could happen for a long time and finally found the answer.
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A protein in your eyes! I mean, birds are more sweaty than they're seeing the Earth's magnetic field.
This protein called Cry4 is responsible for sensitizing blue light and is present in both plant and animal species.
It also plays a role in the study of our biological rhythm, the circadian rhythm.
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Research has shown that the protein works in a sensitive manner to blue light, enabling them to move by seeing the magnetic field.
出门在外多吃点好的，多注意身体。
