John William Strutt, third Baron Rayleigh won The Nobel Prize in Physics 1904. If you are at all interested in the scientific reason for why the sky is blue click . The short answer is; the process called Rayleigh scattering.
I wonder what Baron Rayleigh would think about “SMILEY GUYS” in the sky?
Landscapes, skyscapes and sun don’t forget the Polarizing Filter. So What Does It Do? First of all it can darken blue skies turning them a deep, rich blue.
If you really want to know about the color blue go see what the “kids” have to say.
Right now I’m doing a study on ( UV ) radiation or SUNBURN. Did you know: The use of sunscreen is known to prevent the direct DNA damage that causes sunburn and the two most common forms of skin cancer, basal-cell carcinoma and squamous cell carcinoma. However, if sunscreen penetrates into the skin, it promotes indirect DNA damage, which causes the most lethal form of skin cancer, malignant melanoma. This form of skin cancer is rare, but it causes 75% of all skin cancer-related deaths. Increased risk of malignant melanoma in sunscreen users has been the subject of many epidemiological studies. From WIKIPEDIA