system
A chat on subreddit /r/NoStupidQuestions
human
&gt; absence of evidence is not evidence of absence

Granted. I thought the ice sheets at core were older than that.

The absence you state, however, is massive and gaping. It's the same gap of evidence that people fit Atlantis and moon Nazis in, and dinosaur civilization and tech is even less likely.
gpt
Sure, it's more of speculative fun than any serious argument.  

The main point is more along the lines of humans being far less consequential than we like to think of ourselves.   But throughout history humans have disproportionately spent on self-aggrandizing, so that's how we roll as a species.