Geomagnetism and life are closely related - lack of magnetism affects life and health

1) NASA's famous white rat
Magnetic Control Experiment on White Rats
White rats were placed in a magnetically shielded nickel-iron high permeability alloy round dance, and after a period of time, it was found that the rats living under the shielding conditions became inactive and aged before they were old, nearly 14% of the adult rats showed gradual fur loss, and many of the rats died by the sixth month.

2）Astronauts go into space, far from the Earth's magnetic field.
The astronauts went into space, away from the earth's magnetic field, and their bodies became “magnetically starved.”
This causes the astronauts to suffer from a brief period of “demagnetization syndrome”. To put it simply, the lack of grounding (being far away from the Earth's magnetic field) causes a “lack of magnetism syndrome”, so astronauts return to Earth with various symptoms such as dizziness, headache, insomnia, fatigue, constipation, palpitations, unstable blood pressure, dermatitis, joint pains, tinnitus, and so on.