Or instead of stone tablets you could simply build a 10,000 year clock. https://www.businessinsider.com/everything-you-need-to-know-about-jeff-bezos-amazing-10

Or instead of stone tablets you could simply build a 10,000 year clock. https://www.businessinsider.com/everything-you-need-to-know-about-jeff-bezos-amazing-10000-year-clock-2013-8 https://www.businessinsider.com/everything-you-need-to-know-...