99.9 % of human DNA is identical. The remainder of this DNA information is different because of mutations that happen in a random manner going back in time generation to generation.
“Europeans living today, in whatever country, are a varying mix of
ancient bloodlines hailing from Africa, the Middle East, and the
Russian steppe.“
“The evidence comes from archaeological artifacts, from the
analysis of ancient teeth and bones, and from linguistics. But
above all it comes from the new field of paleogeneti