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Scientists were able to determine that solar radiation, affecting the fetus in the mother's body and those received during the year from birth, can increase infant mortality and shorten the life expectancy of the population.
Where did these conclusions come from?
Scientists looked at people living in Norway over the past two centuries. It turned out that people who were born and lived during the peak solar activity lived on average 5.2 years less than those born in the period of lower solar activity (check at the end of the article if you were born during the highest or the lowest solar activity) .
The peak of solar activity leads to increased solar radiation on Earth. Some studies even suggest that increased UV radiation may degrade folic acid and vitamin B9, responsible for rapid cell division and growth. Excessive influence of the sun can have an adverse effect especially on the body of the future mother and the condition of the fetus.
Until now, the effects of UV radiation on the development of living organisms have been well understood. It has been proven that it can affect the development of molecular and cellular processes. Also well researched the effect of UV radiation on the health and reproduction of aquatic animals.
However, it has not been discovered yet the impact of the sun on people's life expectancy. Researchers from Norway have analyzed demographics of over 9,000 people born in Norway. They compared this data with evidence of historical solar radiation cycles collected by the National Oceanic Atmospheric in the USA.
The researchers found that people who were born during periods of high solar activity were less likely to live to old age and more often died before they were two years old. In addition, among women born in years of high solar activity, having lower incomes and spending a lot of time outdoors - often on manual work - lower fertility rates and often a tendency to have fewer children compared to richer women were found.
Studies show a correlation between life expectancy and UV radiation. They do not indicate the reasons for this relationship.
Scientists emphasize that environmental factors affecting the mother and the fetus in early life have a huge impact on their future fate.
Will the thesis confirmed on two generations also be reflected in the fate of the others?
For those interested, it is worth adding: in recent years, the maximum effect of the Sun was observed in 1957, 1968, 1979, 1989, 2000 and 2013. The years with the minimal influence of the Sun are: 1954, 1964, 1976, 1986, 1996 and 2008.