Recently, I found some article that is talking about "Nature or Nurture". It has been reported that the terms "nature" and "Nurture" play the roles of heritably and environment in human development. I think that a part of heritability can't change even with the environment permit. Like, eye color, skin color and hair color. That determined by specific genes encoded in each human cell and it called nature, so that can't change. But for behavioral geneticists, sometimes not only depend on gene, the environment also influences behavior a lot. Some scientists did a research for twins, although twins have similar genes, under the different environment they show the different behavior. That called "Nurture". For example, I read a paper that describes a boy brought up by wolves in the forest. When the boy grew to 8 years old, he also can't speak. He can't live like a normal person, he is good at crawling and barking. Although this boy has human genes, due to the environment he also changed a lot. This example shows that the power of environment. Psychologists have come to appreciate that genetic and environmental influences human being in many ways, like thought, feeling, and behaviors.