Interdimensional hypothesis - Wikipedia
Wilson has continued to experience a high level of interaction with several types of alien intelligences including different types of Greys, various stages of alien-human Hybrids, Blondes or Nordics, Short Pudgy Beings, Tan Wrinkled Beings, Interdimensional Beings, Super Conscious Beings and incorporeal influences.
The interdimensional hypothesis (IDH or IH), ..
Sagan is, of course, taking note of the peculiar fascination we in the United States seem to have with the UFO-ET hypothesis, as opposed to other conventional explanations and, also, as opposed to other titillating popular hypotheses--e.g., interdimensional beings, religious beings, time travelers, etc.
UFOs caught on camera during the NASA Space Shuttle STS-80 mission. The interdimensional hypothesis (IDH or IH), also called the extradimensional hypothesis ...