DNA science is still in infancy but is nevertheless very solid science.
--Criminal law, to convict and to exonerate suspects
--Paternity
--Genealogy
--Origins, location and ethnicity
--Medical science, identification of illness risks, etc.
Genes determine most of our physical characteristics; eye, hair, skin color. Height, weight, physique, etc.
Small parents beget small children; large parents beget large children, on balance.
Science will "discover" proof about IQ and genetics, but it will be deemed to be fake science, and "racist."
When I was young, around 12, when I first started watching basketball on tv I remember watching the final game of the state basketball tournament. One team was from the northern part of the state and all the players were white. The other team was from the state's biggest city and all-black.
One thing I noticed was the black players all ran faster, moved quicker, and jumped higher than the white players. I wondered why that was.
Over the years as I watched more sports I observed that black players in the major sports other than hockey tended to move faster than white players. All the great NL baseball players were black, including my personal idol Hank Aaron.
These anomalies were explained to me by various "experts" as simply black athletes working/practicing harder than white players and wanting it more. All human groups had the same/equal natural, athletic ability.
But I became more confused as I observed that all the U.S. track stars in the sprints were always black. You don't have to develop much of a skill to run the sprints...you're either fast, or you're not.
Finally, in my early twenties I realized that the "experts" had lied to us. The chances of that many black athletes dominating major sports considering their numbers in the population compared to white and other non-black athletes could not be something random.
For the past fifty years every U.S. sprinter in the Olympics, male and female, has been black. The chances of that being a random event are incredibly humongous.
So then I thought if the "experts" lied to us about physical abilities, did they lie about mental abilities? For sure they did.
The question is: why did they lie?
I would guess, from reading their own literature, that many of them wished to avoid racial conflict. Many, I'm sure, really believe there is no difference, mentally or physically, between the different racial groups of the world.
My question is: that over the hundreds of thousands of years of human existence, what would be the harm in admitting that the different races or groups of people around the world differ in natural physical and mental abilities?
I didn't collapse in a heap when I realized my younger sister was smarter in math than I was nor when I realized two of my brothers were better natural athletes than I was.
What would be the harm in admitting the truth: some groups of people at certain points in the history of mankind are superior in some physical or mental aspects than some other groups?
For the record, I don't believe in any particular ethnic group being superior in the sense that they've always been superior to other groups. Over time positions may change due to unpredictable circumstances.