Both nature (genetics) and nurture (environment) play a role in shaping who we are, and their interaction is often the most influential factor in a person's development. Mental health can be ...

While lifestyle choices, including diet and activity level, play an important role in a person’s risk of obesity, genetics can also shape natural tendencies toward weight gain or loss. In fact, genes ...

Identical and fraternal twins can provide insight into the effects of nature and nurture on factors such as eye color, intelligence, and autism. The environment can sometimes "override" genetic ...

The environment can sometimes "override" genetic advantages. For example, IQ is highly heritable, but growing up in an impoverished household can lead to large discrepancies in twins' IQ. Conjoined ...