ET's, so-called

[david collier]

It seems obvious that so-called Extra terrestrials are in fact Endo-terrestrials, i.e., our own descendants living in large cave systems in the future when global warming has made the surface uninhabitable. After around 1,000 years of technological development it is very likely they have mastered anti-gravity propulsion and time travel, the two being linked.
The usual description of large eyes suits living underground; by that time we will also have developed telepathy and telekinesis, found only in a few at present. We/they probably genetically modified the human body to suit the new limited environment.
I am told 'they' subsist on GM mushrooms, hence no need for large mouth or jaws. And telepathy means no more words or written language; telekinesis no need for a developed musculature, hence a small and skinny body.