DANNY'S CLOCK OF THE LONG NOW - Part 1 of 3 

From Web of Stories: Danny Hillis, computer scientist and inventor, tells the story of how he and Jeff Bezos of Amazon come to be building a huge clock, unlike any other clock, under a mountain in West Texas - a clock whose 'cuckoo' comes out only once every thousand years...
You can also see Danny tell his life story for free at Web of Stories webofstories.com/play/danny.h... and on RU-vid at bit.ly/2FbFbyg