History to repeat itself at Yosemite





Ansel Adams, the venerated photographer, was notably scrupulous about recording the details of his craft — camera apertures, shutter speeds, film type — as he documented the Western outback in monochrome. But he also was notoriously poor at writing down dates.

Now a team of Texas astronomers has found that one of Adams' photos of the Yosemite backcountry, a solitary shot from Glacier Point of the moon rising over saw-toothed peaks beside a pillow of clouds, was misdated by four years. But also that the celestial clock is ticking toward a rare encore performance early on Thursday evening, re-creating the same dance of moon and mountains Adams captured on the same date more than half a century ago.


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