What environmental or nurturing factors make some groups different from others in a repeating statistically significant way?

[jennifer_bloom]

One example is that the average woman in China weighs 125 pounds while the average woman in America weighs 171 pounds.

The average I. Q. of Jewish people in Israel is around 90 points while Jewish people in America average over 115 in I. Q. scores.

The average i. q. of East Asians in Asia and in America does not change based on country of residence, and is above average in both regions, while the average I. Q. of Jewish people in America is 25 points higher than the average I. Q. of Jewish people in Israel.

I would say over 25% of Indians born in North America are over 6 feet tall while in India, Indians tend to be shorter than the average white North American.

Also even Chinese guys are unusually tall if they are born in Canada and Chinese born North Americans are much shorter than North American born Chinese people.

An example is I know. a Chinese guy born in Canada that is around 7 feet tall and his parents are both under 5"9 and his parents were born in East Asia.

[purplepoppy]

If I get a pack of sunflower seeds they'll all be pretty genetically similar. Short varieties will never grow 6ft tall no matter how much you feed them. The tall varieties can grow huge heights, they're genetic program tells them to grow as high as possible. But the height they achieve is limited by outside factors, one spot may have more light, more food, less wind, less pests.

It's the same with humans, next time you drive past a poor neighbourhood look at a towerblock. Behind anyone of those windows could be someone with the genes to be the next Einstein or the next Leonardo, but we'll never know.