Tag Archives: Ultraviolet

Vitamin D apparently has nothing to do with skin color

This article is a reminder that in science, nothing is certain until you have evidence (even then, nothing is totally certain): In human evolution, changes in skin’s barrier set northern Europeans apart — ScienceDaily. The popular idea that northern Europeans developed light … Continue reading

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What is Color? — Starts With A Bang! — Medium

This article is Ethan Siegel’s response to Alan Alda’s challenge to explain color in 300 words of less.  He meets that challenge, albeit with a lot of visual aids. It’s one of our most common experiences, and we all know … Continue reading

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