>>6967226(start of part 2) A lot of our technology today is metal-based and metals oxidise over time. Our metal skyscrapers, if untouched by humans and unharmed by tsunamis, earthquakes, tornadoes, etc. would probably become dust within 10,000 years. If you want to build structures that will last for eons, you would build those structures using stones.
"Man fears time, but time fears the Pyramids." - Arab proverb (end of part 2)