Sexual differentiation in humans Sexual differentiation in humans Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following gonadal determination. Sexual differentiation includes development of different genitalia and the internal genital tracts, breasts, body hair, and plays a role in gender identification. The development of sexual differences begins with the XY sex-determination system that is present in humans, and complex mechanisms are responsible for the development of the phenotypic differences between male and female humans from an undifferentiated zygote. Females have two X
Humans of planet earth Humans of planet earth Humans of Planet Earth is a project aimed to regroup 100 photographers from 100 locations around the world, in an effort to capture 10000 portraits of people. The project was initiated by a New Zealand-American Brandon Van Slyke, in an effort to gain a perspective of the planet and its people, particularly if it contrasts from stereotypical prevailing media portrayals. The initiative was inspired by the Humans of New York (HONY) blog, an attempt to document people from New York City. The portraits and stories are shared on a Facebook page, in addition to the main