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How Did Blue Eyes Develop

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How did blue eyes develop? Was it a primary eye colour, or did an event occur in history that altered a person’s eye colour? Originally, the entire human species was born with brown eyes. However, it was not until 6000 - 10,000 years ago that blue eyes were introduced through genetic mutation and essentially augmented across populations. The earliest cases of blue eyes were those living near/around the Black Sea. It has been said that this was the location where the single blue-eyed common ancestor originated from. However, as generations progressed, the blue-eyed population became prominent in locations such as Southern Russia and Scandinavia. Side Note: In the 21st century, 95% of the population from Scandinavia has blonde hair and
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