12 votes The 26,000-year astronomical monument hidden in plain sight Posted January 30, 2019 by rfr Tags: astronomy, usa, the long now, hoover dam, united states bureau of reclamation, archival research, axial precession, alexander rose https://medium.com/the-long-now-foundation/the-26-000-year-astronomical-monument-hidden-in-plain-sight-9ec13c9d29b5 Link information This data is scraped automatically and may be incorrect. Authors Alexander Rose Published Jan 29 2019 Word count 1406 words