Waiting for the day that the mainstream wakes up and realizes/remembers that "great", highly technological civilizations have come and gone for tens of thousands of years. Millions even. By all counts, we're still living in the dark ages.
Well, at least ~12,000 years (Gobekli Tepei). Hard to confirm prior to that. Not saying there haven't been older civilizations, just haven't seen tons of proof. I find it quite fascinating to think about.