It is often said that The people, space brothers in physical bodies on Mars and Venus, Mercury, Jupiter are not at the same level or vibration of physicality that we experience.
Vibration is different.
We know only three aspects of the physical: solid physical, liquid physical and gaseous physical.
Above gas there are still four further levels of physical matter which have not been discovered on this planet.
When they are discovered we will understand a great deal more about the nature and origin of disease, the purpose of life on this planet and of the reality of life on other planets.