Summer has a lot of great things: fireworks, pools, barbecues and great weather. However, there is a bad part about spending all that time outside: sunburns.
One can imagine that there have been sunburns for as long as we've had skin. While we've learned a lot about how the sun's UV rays damage the skin, little has been known as to why overexposure turns it into a red painful mess. That is,
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