
How much sun is too much?
We all know that too much sun is bad for your skin. But how do you know how long you can stay in the sun? You can't see or feel UV light, so it's dif...
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The skin acts as both the body’s shell and shield as well as a sensory organ. But what is it made up of? What is the purpose of hair and how do nails grow?
Skin, hair and nails from A to Z