'Calendar' rock carvings from Ancestral Pueblo discovered

The carvings were found at a site called Castle Rock Pueblo on the Mesa Verde plateau straddling the Colorado-Utah border. Early Native Americans may have used the ancient rock carvings as a calendar. Full Story: www.livescienc...
Credit: Live Science | imagery courtesy: Jagiellonian University | edited by Steve Spaleta / stevespaleta
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[@BlackSeranna]

I guarantee someone knew they were there, they just didn’t tell anyone because they wanted the site to remain pristine.

[@jordanezell5132]

That’s a reasonable statement. Even if tourists and explorers were careful to not touch anything, they could still cause damage just by being there in person (use your imagination).

[@RobinOfTheWest]

To act as a calendar, the circular petroglyph would need to face South and have something fairly close which casts a shadow on it which changes position through the seasons.

[@babbalonian2]

or a boy scout group in the 1950's.

[@BlackSeranna]

No.