The presence of a brother or twin sister increases the chances of a long life. This is indicated by the results of research of scientists from Denmark. They proved that the duration of human life in any degree depends, he was born alone or simultaneously with another child.

Scientists chose the period from 1870 to 1900. Men at that time lived on average 45 years. Among twins, the life expectancy was 6% higher. The average life expectancy of women in the 19th century was 60 years, women-twins approximately 65 years (10% more).

It is possible that the support of the brother or sister was helping people get out of difficult situations and to fight diseases. Data on life expectancy of twins born recently, scientists provide.

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