Methylene blue (ProvayBlue) is a medication doctors use to treat a rare blood condition called methemoglobinemia. Naturally, methylene blue is a solid. But as a medical treatment, it’s dissolved in ...
Blue light has acquired a dubious reputation in recent years, frequently blamed for everything from disrupted sleep patterns to digital eye strain. This high-energy light, emitted abundantly by our ...
Jean-Baptiste Oudry, "Belphagore" (1734), brush and black ink, gray wash, heightened with white gouache, on blue paper; 12 1/4 x 10 1/4 inches (image via public domain, all images courtesy Getty ...
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