DNA science is well "settled" since it is used to solve and prosecute crimes, paternity, identify remains including battlefield, and medical/health issues.
Origins, cousin matches from DNA compnies is "popular," but not really the leading edge of DNA research.
The migration "out of Africa" story, has been known for awhile, and is told by the leading DNA test companies.
mt-DNA = motherline
Y-DNA = fatherline
Autosomal = regional origin location
are just a few terms that anybody can search, if interested.
My own fatherline DNA from two companies, ties exactly to 500 years of well researched genealogy.