The fist thing about extraterrestrials is that they are attracted to this planet because of what the environment has to offer. While extraterrestrials may be humanoid they may of adapted to living in the oceans or even the extreme heat of an active volcanoe.
Extraterrestrials fly both UFO (Unidentified Flying Object) and USO (Unidentified Submersible Object) both have been well documented. Astoundingly UFO's have been seen flying straight in to active volcanoes. Extraterrestrials have been seen by telescope syphoning plasma from our Sun. Plasma can be used to power spacecraft.
There are over eighty-six different kinds of extraterrestrials known at this time. There are four that the US Government has agreements with. They are the Tall Whites, Anunnaki, Greys, and the Reptilians. Native American Indians documented contact with the Ant People thousands of years ago in what is now the Hope Indian Reservation.
All this is further complicated by the Kardashev Scale. …