How Our Skin Knows When to Tan
2012-03-02
What’s on your calendar for the rest of 2012? Here’s a question that those of use who are able to escape the cold by heading for warm beaches may ponder: How does our the skin know to start tanning after the sun’s rays hit it? Researchers have discovered that our skin can "see" the sun’s ultraviolet rays using the same light-sensing pigment that’s found in our eyes.
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