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Adam
@adam-
The Cyanometer: A Tool to Measure the Sky’s Blueness Invented by Swiss scientist Horace-Bénédict de Saussure in the 18th century, the circular chart contains 52 shades of blue. Inspired by his love for the Alps, especially Mont Blanc, Saussure climbed to great heights to study the deeper blue skies at higher altitudes.
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shanli🎩
@shanlii
It was interesting cast
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