Do you really need a study to see that the top athletes in the Olympics, for example, are all there due to genetic advantages? Whether it's higher endurance, a

Do you really need a study to see that the top athletes in the Olympics, for example, are all there due to genetic advantages? Whether it's higher endurance, a tiny difference in bone structure, longer arms, greater height, etc. - that's all mostly genetics with a bit of environmental factors mixed in (like childhood nutrition) But cognitive abilities and intelligence are far less understood, because you simply can't measure it as well as physical achievements (in fact, some of the top comments here gripe about using a PhD degree as a benchmark for achievement; or patents; or publications; or even income level)