system
Given the following post, respond as if you're commenting on Reddit:
human
[Alien Franchise] Is extraterrestrial life common knowledge?

There are apparentlky standard procdures for any extraterrestrial life a shipping vessel finds, which suggests its fairly common for people to come across alien life.

Besides that, in *Aliens*, a Marine mentions having sex with some androgynous race (whether this is a human or not was never very clear) 

SO, are humans aware of alien species besides the Xenomorphs, or just a hopeful, diverse species?
gpt
During the briefing of the Marines aboard the "Sulaco", one Marine asks (I paraphrase), "Is this a straight-up fight, or a bug-hunt?", to which, once informed that there is a xenomorph involve, a second Marine replies, "it's a bug hunt", in a tone that suggests that "bug-hunts" are the latrine duty of Colonial Marines. 

So extraterrestrial mega-fauna must be common knowledge by that time.