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How spring can affect your sense of smell and other bizarre facts about the season
The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible.
Depending upon which definition you use, there are actually two different dates that mark the first day of spring.
You can’t see UV but its damaging effects can stay with you for life. In fact, eyes are 10 times more sensitive to UV than skin.
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