The members of the Atlantean Mystery School were the earliest human explorers of the frontiers of inner space. Through their meditative journeys and explorations, they discovered many secret astral passageways that led to an infinite variety of other worlds and dimensions.
In the Atlantean period there were many energies being used and information and knowledge being used which were, for particular reasons of safety, withdrawn, shall we say, to prevent complete catastrophe, to prevent total destruction of your planet.
There were many stages to the Atlantean civilization. During the later stages, scientists became involved with advanced particle physics. In particular they were interested in reverse gravity fields.