Danny Hillis, and his team of engineers in the Long Now Project, is completing his 10,000 year clock. It is an effort to make people slow down and take a long look at the future. Some of the problems?
How long is 10,000 years? If we look back to 8,000 BCE here are some of humanities major accomplishments:
8700 BCE: Metalworking in copper was starting to happen.
8500 BCE: Agriculture in the Fertile Crescent was starting to take place.
8000 BCE: Mesopotamia developed primitive writing.
Some of the challenges: What language to write a manual in? Where to build the clock.