The planet Mercury has an extremely rarefied helium atmosphere. The existence of such an atmosphere is supported by the decay of radioactive isotopes in the planet’s crust and the release of helium from the surface and by capturing its cores from the solar wind. Without the constant action of these factors, Mercury would have lost its gas shell literally in a day.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.