Evolutionary Origin
It is hypothesized that epicanthic folds are caused by climatic factors and it may have originated more than once during human evolution. Sexual selection may have also influenced the evolution of the trait. The genetic basis of the adaptation is not well known.
Read more about this topic: Epicanthic Fold
Famous quotes containing the words evolutionary and/or origin:
“The point is, ladies and gentlemen, that greed, for lack of a better word, is good. Greed is right. Greed works. Greed clarifies, cuts through, and captures the essence of the evolutionary spirit.”
—Stanley Weiser, U.S. screenwriter, and Oliver Stone. Gordon Gekko (Michael Douglas)
“Our theism is the purification of the human mind. Man can paint, or make, or think nothing but man. He believes that the great material elements had their origin from his thought.”
—Ralph Waldo Emerson (1803–1882)