Deep inside a mountain, a full day’s hike from any road, in a dry, deserted part of West Texas, a foundation funded by Jeff Bezos is building a giant clock that’s hundreds of feet tall. It’s been called the Millennium Clock, the 10,000 Year Clock and the Clock of the Long Now. Like the Pyramids, Stonehenge and the Colosseum, its makers hope it will outlast our civilization and tick for 10 millennia. Marketplace’s Meghan McCarty Carino spoke with Alexander Rose, executive director of the Long Now Foundation, which has been building the roughly $40 million prototype of the clock in Texas.