According to the latest research by the university of Edinburgh (and actually not so latest research, as I recall being told this decades ago), having a very diverse parental genetic background gives a child a better chance in life.
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| Kissin Cousins USA ...... |
The outcome of these liaisons are both taller and smarter. The research
looked at the DNA of over 350,000 people worldwide and confirmed that
the offspring of unrelated parents, were both lankier and more
intelligent than the offspring of people who were closely related, such
as being first cousins.
