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.
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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