UV rays
How Screwed Am I From Bad Sunburns I Got as a Kid?
About one in five Americans will develop skin cancer during their lifetime.
Scientists Are Trying to Make Sunscreen Way Less Annoying
They'd like it to be as easy as swallowing a pill.
We Asked 20-Somethings Why They Still Use Tanning Beds
The risks are well known, but that's not stopping many young men and women from soaking up UV rays.
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How to Get an Intergalactic Sun Tan Without Leaving Earth
Ten trillionths of your sun tan is the result of photons made by distant stars and supermassive black holes.
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