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Research shows that the richer people are, the lower the non biological rate. Are you biological

According to the Journal of current biology on November 14, the research team of the University of Leuven in Belgium tested 500 pairs of male samples from Belgium and the Netherlands (two men in each pair are from the same ancestor). The results show that on average, 1.6% of people in each generation have fathers who are not their own biological fathers, and the richer the people, the lower the non biological rate.