It turns out that crabs rely on the geomagnetic field to determine direction. In the long years since the formation of the earth, the geomagnetic north and south poles have reversed many times. The reversal of the geomagnetic poles has left many creatures at a loss and even caused extinction. Crabs are an ancient migratory animal with small directional magnets in their inner ears that are very sensitive to geomagnetism. Due to the reversal of the geomagnetic field, the small magnets in the crabs' bodies have lost their original directional function. In order to survive the reversal of the geomagnetic field, crabs adopt the approach of "responding to changes with constancy" and simply do not move forward or backward, but walk sideways. From a biological point of view, the chest of a crab is wider from side to side than from front to back, and its eight walking legs are stretched on both sides of the body. Its front foot joints can only bend downwards. These structural features also make crabs walk sideways.
The answer to why crabs walk sideways seems to provide us with a revelation to solve certain problems in life. When a person lives in the world, he will encounter many changes that are not subject to human will, and the best way to adapt to these changes is to adjust himself. Otherwise, he can only be like those creatures that are not adapted to the reversal of the geomagnetic poles, causing the tragedy of "extinction". In fact, when dealing with the troubles of life, instead of moving forward or backward, walking sideways may bring you a different world. Perhaps others ridicule the crabs for their ugly walking posture, but no one can deny that crabs will walk faster sideways.
Due to the changes in the geomagnetic field, many animals rely on the geomagnetic field to determine the direction, especially for migratory and migratory animals, the geomagnetic field plays a big role. Crabs are an ancient migratory animal, and their inner ears have small directional magnets that are very sensitive to geomagnetism. Due to the reversal of the geomagnetic field, the small magnets in the crabs' bodies have lost their original directional function. In order to survive the reversal of the geomagnetic field, crabs adopt the approach of "staying the same in the face of change". They simply do not move forward or backward, but walk sideways.
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