As far back as 2,300 years ago, people knew the sun could make you sneeze. In The Book of Problems, the ancient Greek philosopher Aristotle pondered: "Why does the heat of the sun provoke sneezing?" Despite the fact that we have long known that the sun causes some people to sneeze, very little is known about the condition today. It is not considered a hot topic to research, so very little medical or genetic investigation has taken place.

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