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Amazon CEO Shares Video of 10,000-Year Clock's Construction

The clock is being built inside a mountain and will run for 10,000 years. Bezos has spent at least $42 million on the project.

 & Michael Kan Principal Reporter

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What do billionaire tech CEOs do in their free time? The head of Amazon has been busy building a giant clock.

On Tuesday, Jeff Bezos released a video of his pet project: a 500-foot tall timekeeper located in Texas that intends to run for 10,000 years. "Installation has begun," Amazon's CEO said in his tweet.

The project may sound odd and antiquated in today's digital age. But to Bezos, the elaborate timepiece is meant to convey a message: the idea of long-term responsibility.

"As I see it, humans are now technologically advanced enough that we can create not only extraordinary wonders but also civilization-scale problems," he wrote in a post about the project. "We're likely to need more long-term thinking."

The idea for the 10,000-year clock actually originated back in 1986 with Danny Hillis, an American computer scientist. He too was concerned that society had developed a "mental barrier" to long-term thinking, and so he co-founded a foundation to sponsor its construction.

It wasn't until 2011 when Bezos' interest in the project also emerged. In an interview with The Wall Street Journal, Amazon's CEO revealed he had spent at least $42 million on the clock.

The high price tag probably has something to do with how it works. Bezos is building the device inside a mountain on property he owns. To run for 10,000 years, the timepiece will harness the power of the temperature difference from the top of the mountain down to the bottom. Long metal rods can transfer the thermal power to the interior of the clock.

"As long as the sun shines and night comes, the clock can keep time itself, without human help," the developers have said. However, human visitors can wind up the giant device too.

Bezos 10,000 year clock

The new video from Bezos shows construction workers lowering various gears through the shaft in the mountain. They've also installed a giant bell for the clock's pendulum.

It'll take "many years" before the project is finally done, according to Bezos. But the upcoming monument will be open to the public.

Those who make the trip are in for a trek. The project resides several hours away by car from the nearest airport. You'll also have to climb a rugged foot trail to reach it. "Visiting the clock will take a commitment," Bezos wrote in his post.

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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