The 10,000-year clock is a visionary timepiece being built inside a mountain in West Texas.

Designed by Danny Hillis and funded by Jeff Bezos, it ticks once a year, with a century hand that moves every 100 years and a cuckoo that appears only once every millennium.

Crafted from marine-grade stainless steel and high-tech ceramics, it’s built to last for 10,000 years, surviving temperature changes and humidity.