Changes

The amount of [[melanin]] in one's skin naturally determines how dark it is. Some historical ideals of beauty exalted the lightness or darkness of skin. The 19th century American song, "The Yellow Rose of Texas", referred to the slightly dusky color of a girl's skin.

The amount of [[melanin]] in one's skin naturally determines how dark it is. Some historical ideals of beauty exalted the lightness or darkness of skin. The 19th century American song, "The Yellow Rose of Texas", referred to the slightly dusky color of a girl's skin.

Since prehistory, human populations have gone through periods of isolation and intermixing which lead to differences between groups. [[Scientists]] now believe that these are largely a matter of different statistical frequencies of variations from an agreed-on standard, rather than racial differences as was once thought. Modern [[Homo sapiens|humans]] share approximately 99.9% of their [[DNA]]. Of the .1% that does vary, 85% of the observed variation is unconnected to membership of any particular group of people.

Since the beginning of mankind, human populations have gone through periods of isolation and intermixing which lead to differences between groups. [[Scientists]] now believe that these are largely a matter of different statistical frequencies of variations from an agreed-on standard, rather than racial differences as was once thought. Modern [[Homo sapiens|humans]] share approximately 99.9% of their [[DNA]]. Of the .1% that does vary, 85% of the observed variation is unconnected to membership of any particular group of people.

==Modern Definitions==

==Modern Definitions==