Why Do Things Fade in the Sun?

Science
Have you ever noticed that sunlight makes colors fade? Join Quick Questions as we explore why that happens.

Hosted by: Hank Green
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Sources:
http://www.pcimag.com/articles/85044-radiation-chemistry-in-eb-and-uv-light-cured-inks
http://www.jmeagle.com/pdfs/Technical%20Bulletins/TB10SunlightEffectsonPVC.pdf
http://www.nature.com/jid/journal/v29/n6/full/jid1957119a.html
http://www.epa.gov/sunwise/doc/sunscreen.pdf

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