“1. Femoral (thigh bone) Anteversion vs. Retroversion Angle … If your thigh bone shaft has a retroversion angle, your toes naturally point outward, making your turnout easier.”

https://www.performancehealth.com/articles/exercises-for-ballet-dancers-improve-your-turnout

So as someone here at Neo’s or else on another site said, those with turnout, tend to walk with their feet pointed outward.

Now this, I have seen, and noticed and thought that it was some leg problem some people had as the flapped along the sidewalk like ducks.

At the same time, those of us who’ve watched old Samurai movies might now come away with the impression that Japanese people – or those featured in the films – ought to be the greatest potential ballet dancers in the world. https://youtu.be/y_1iT_GmHTE?t=124

There are more Hispanics than Blacks in America – but not in the NBA. In fact, the NBA could be called systemically racist against Hispanics, based on their lack.

Of course, those with common sense will say it’s because genetically one can’t really change height. But that just proves the whole rules are racist, if genetics supports such discrimination based on height.

Still, Ethiopians and East Kenyans will continue to dominate marathon runs and records, based on their special genetics.

That Tesla example is amazing. I had not heard that. It’s also interesting how leaps of innovation and inventiveness seem to have an age range; around 26 – 33. I imagine most inventors and innovators would state they believe they are even wiser in their late 30s and 40s, but there is something about that age range that seems to promote unique sparks of creativity. We see the same in the creative arts; music, painting, sculpture.

Well, it has happened, and the results are promising. We will almost certainly see more and more cyclists descended from pre-Colombian Americans in the classic, European tours as their success travels to their homelands, inspiring children to take up the sport.

If you grab two random people from Africa and swab their DNA, then grab two random people from anywhere else on Earth (one from Argentina and one from Siberia); odds are the two from Africa will be more genetically different from one another than the person from Argentina is from the person from Siberia. What this means is, as someone wrote in the comments, you can find people genetically predisposed to be brilliant singers in Africa, but you can also find people who are tone deaf and have horrendous voices. African has some of the tallest folks on the planet and some of the shortest. And on, and on.

Someone mentioned one sees a lot of “blacks” in the Olympic sprint finals. This is true; but one is seeing a lot of blacks from a certain immigrant group that settled in Jamaica. One does not see a lot of Egyptians in the Olympic sprint finals, or Somalians.

And it is also important to remember that the majority of Africans living in the U.S. are integrated with folks from all over the world. Unless they are recent immigrants, they almost certainly have mixed with other ethnicities, other races… Just as most Americans who are non-black, and also not recent immigrants.

So, to neo’s point about hip joints and turnout. It may be that joint configuration is not typically prevalent in most Africans from African regions that are currently settled in the U.S., but there may be others in Africa who are incredibly well suited to ballet dancing.

The Heinlein quote goes on to say:

“This is known as ‘bad luck’.”

From describing and comparing many different examples of invention and discovery, Koestler concludes that they all share a common pattern which he terms “bisociation” – a blending of elements drawn from two previously unrelated matrices of thought into a new matrix of meaning by way of a process involving comparison, abstraction and categorisation, analogies and metaphors.

https://en.wikipedia.org/wiki/The_Act_of_Creation
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A classic sixties book, prominently featured in the “Whole Earth Catalog.”

Another example of such analogical thinking is Tesla’s comment that he got the idea for the three-phase AC motor when thinking about a passage in Goethe’s Faust:

“The glow retreats, done is the day of toil; It yonder hastes, new fields of life exploring; Ah, that no wing can lift me from the soil Upon its track to follow, follow soaring!”

…though the connection to the invention is less-obvious than in the case with Farnsworth.