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Isolation in Homo sapiens has never lasted long enough for the establishment of the isolating mechanisms that prevent interbreeding and lead to speciation. Humans do, however, follow many of the rules that apply to animals; for example, pigmentation is more intense in the humid tropics than in arid, cooler regions. Body extremities and body surface as a whole are reduced in animals in very cold climates; this principle is demonstrated by the Inuit. It has proved impossible to measure mental differences between groups in an objective way, and there is no acceptable scientific evidence to suggest that one race is superior to others. The attempt to categorize human types, as in South Africa for the purposes of segregation, is inevitably doomed by the absence of any straightforward distinction. Since humans can all interbreed to produce fertile offspring, they must all belong to the same genetic species.
The stars are said to represent Syria and Iraq. Red, white, black, and green are the pan-Arab colours. Effective date: 29 March 1980.
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