It Was From This Moment in History That Humans Started to Have Blue Eyes

Written by Romário Pereira de Carvalho

Published on 26/06/2025 at 20:44

Updated on 26/06/2025 at 21:03

Imagem: Unsplash

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Blue Eyes Emerged From Genetic Mutation Up to 17 Thousand Years Ago, But Still Represent About 10% of the World Population

For a large part of human existence, all Homo sapiens had brown eyes. Blue eyes only emerged much later, as a result of a genetic mutation that affected melanin production in the human body.

The change occurred due to a mutation in the HERC2 gene. This gene influences the activity of OCA2, responsible for melanin production.

The mutation does not eliminate the pigment completely, but reduces its quantity, causing the eyes to appear lighter.

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The Color of Eyes Is More Varied Than It Seems

Many people believe there are only three eye colors: brown, green, or blue. In reality, the genetics of eye color is much more complex.

It involves the action of several genes, not just HERC2 and OCA2. This means there is a huge variety of tones and possible combinations.

The case of the Cheddar Man, a 10,000-year-old fossil found in the United Kingdom, illustrates this well. At the time of its analysis, headlines claimed he had blue eyes and dark skin.

But researchers explained that, in fact, his eyes were a mix of blue-green with hints of brown and yellow.

Blue Eyes Are Not Disappearing

Many have claimed that blue eyes could disappear over time. But this theory has no scientific basis. As it is a recessive genetic trait, it can continue to exist even if it does not appear in every generation.

Today, about 10% of the world population has blue eyes. Moreover, millions of people carry the genes necessary for them to re-emerge in the future.

With information from Olhar Digital.

It Was From This Moment in History That Humans Started to Have Blue Eyes

Blue Eyes Emerged From Genetic Mutation Up to 17 Thousand Years Ago, But Still Represent About 10% of the World Population

The Color of Eyes Is More Varied Than It Seems

Blue Eyes Are Not Disappearing

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