Why are slavic people foremost the easter and north ones so beautiful?

The scientists found out that what makes a person visually beautiful is his shape ,that is all his body should match ,in other words every single part of ones�body should have the right seize,shape,color tone, and so on ,all these characteristics should match to each other there might be Harmonious ,for only through this combination of perfection the real physicall beauty can be noticed , of course there are beautiful people in every ethnicity ,but the amount of " right shaped/seized " people in some slavic countries is just above the average from the rest of the world . (harmony and proportion) that�s the keyword , so why are these people so beautiful and so the germanic and sometimes the latin people ? I insist the asian ,african , and other ethnicities can equally be beautiful but for mostly there�s no harmony and proportion in their physicall constitution .