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The Strange Thing EVERY Person With Blue Eyes Has In Common

Gather round, blue-eyed babies, because you all have one thing in common - apart from all having the same eye colour, of course.

After a decade-long study, Danish researchers have concluded that every person on the planet with a pair of sapphire-hued baby blues shares the same genetic mutation, inherited from one, single human ancestor.

Yes, that's right; you all have the same great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, great-, GREAT (ish) - grandfather/ grandmother.

That is one complicated family tree.

"Originally, we all had brown eyes," explains University of Copenhagen's Professor Hans Eiberg. "But a genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a 'switch', which literally 'turned off' the ability to produce brown eyes."

That means that, somewhere between 6,000 and 10,000 years ago, one person's genes mutated just enough to change the adenine (A) gene to guanine (G) gene, altering the pigment that gives colour to hair, eyes and skin.

But - and here's where it gets complicated - since blue eyes is a recessive gene, it wouldn't have been until THAT person met ANOTHER with the same genetic mutation and THEY got together that the first blue-eyed baby was born.

Researchers believe the mutation occurred around the northern area of the Black Sea during the Neolithic era, and that those first blue-eyed humans were the ones responsible for spreading agriculture across western Europe.

Pat yourselves on the back, baby-blues; you've been working hard!

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