system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How does the general human population deal with the knowledge that they are not alone in the universe?

In Avengers the world saw a hole open above New York City and an army of aliens flooded in. In Infinity War they saw these strange circular ships. What do they make of all this? How has humanity moved on since learning that? Are scientists looking for the origin of that life? Has it changed their perception of organizations like NASA or SETI? Does it have any bearing on culture?

How come the people we see interact the most with aliens treat it like it's no big deal? Bucky barely registered that he was talking to a sentient racoon, Cap kind of just nodded at a talking tree...no one seems to react. Why?
gpt
To address the first point, The films seem to imply that people in general seem to be taking it well (are neutral to the implications). We see from Homecoming and others that it's not like the presence of aliens changed the way most people acted (In stark contrast to the DCEU where the world is actively debating the nature of aliens and exist a whole spectrum of responses). It seems to be like "Everything is normal, panic during attacks, go back to normal".

Also, that brings up a good idea, I'd love to see the MCU make a film looks at how society, culture, economics, religion, education has been impacted by the existence of Superheros, Gods and Aliens for 10 years. 

2, Well Cap and Bucky know that Thor and Norse Gods and aliens and like the Chutari exist so a talking tree and raccoon aren't that much of a stretch at this point.