I've been following design and construction of the Clock for years now and it's great to see such progress being made. I can't find them now but there have been a number of very interesting articles through the years looking at finding 10Kyear-capable materials for the clock, the process of finding/creating things to put into the chambers the clock will live in, etc. It's been a great process to watch and I look forward to getting to go see the clock when it's complete.