What if an advanced civilization existed before us
I don't necessarily agree with or buy into everything presented, but it is an interesting thought and possibility.
I'm intrigued by Granham Hancock's theory that there was a civilisation wiped out by flood around 12,000 B.C. These might be the ones called 'divine beings' and 'the men of renown' in the Bible:
The Nephilim were on the earth at that time (and also immediately afterward), when those divine beings were having sexual relations with those human women, who gave birth to children for them. These children became the heroes and legendary figures of ancient times.
So where is the evidence of this?
@Piratefish Graham Hancock shows his evidence for his theory in his YouTube videos. The theory centres around the flood approx 12,000 B.C. and the examples of sites such as Gobelki Tepi and Baalbek that pre-date that flood.
That question always leads me to other races on other planets and how unlikely it is that we are both equally advanced enough to communicate in the present or future because they may have been us 100,000 years ago and are now gone from the face of their planet or won't show up for another hundred thousand years after we have wiped ourselves out.