The arrival of the beings is interesting, they don't descend from the heavens, they materialize. That is, they have mastered the physical plane. Their ship cannily resembles a spore, a psilocybin spore. They have also mastered gravity as well. They are obviously technologically advanced culture. They do not come here to warn us, they come to welcome us. They can take a physical form but they are not inherently physical as they have no skeletal components. They need us, and they will return in 3000 years, but since their time frame is circular, they may already be here under a different guise - under our feet.
Have a look at McKenna's "The Mushroom Speaks", you'll understand....
