A clock designed to ring once a year, for the next 10,000 years has begun installation in the mountains of west Texas. This is a project of the Long Now Foundation, a group dedicated to promoting long term thinking. Human civilization is roughly 10,000 years old, so lets think about what the next 10,000 years might bring.
I really love this clock. I love the hope that it represents. We have a lot of challenges to solve to get there, but setting a milestone like this puts a stake in the ground that we're going to fight to ensure there is someone hear it in 10,000 years.
The Long Now also has an excellent podcast / lecture series which you should add to your rotation.