[Dudebro]

I think it's impossible to tell how an alien culture would act. We only have humanity to go by and it's how most people view this idea. If humanity is any judge we'll encounter hostile aliens trying to push thier agendas on us under the banner of friendship.

What WB is talking about is ancient drawings/artwork that show things that look like space ships. While it is interesting it could easily be just imagination and wishful thinking rather than evidence of ETs.