This can be an alternative universe if there are multiverses out there, or even from a different dimension, and a reality that crisscrosses with ours.
The term ultraterrestrial was coined by John Keel, a journalist and author who investigated UFOs and other strange phenomena.
He
 proposed that some of the UFO sightings and encounters were not caused 
by extraterrestrials, but by ultraterrestrials: entities that have 
always existed on Earth, but are hidden from our perception most of the 
time....<<<Read More>>>...
