The other day I was teaching my daughter about the Mayans, and we learned that they had a shade of blue that remains vibrant despite the passage of thousands of years, and scientists never figured out how to make the pigment. I've spent the last few days being occasionally sad about this beautiful lost shade of blue.
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@tippitiwichet This reminds me of a lost formation of Roman concrete! But your tale of the lost blue is much more evocative. 💙