Long Now Foundation company blog
A 26,000-year astronomical monument hidden in plain sight (2019)
The western flank of the Hoover Dam holds a celestial map that marks the time of the dam’s creation based on the 25,772-year axial precession of the earth.
- Points
- 565
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- 113
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History & Retro ComputingScience & Space2026
On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| Jan 20, 2026 | A 26,000-year astronomical monument hidden in plain sight (2019) by mkmk | 565 | 113 |
