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Doppelgängers: You may have a twin who is not your brother

Discover what doppelgängers are: science reveals surprising genetic similarities between unrelated people, showing unexpected connections....
Author: Patricia Alegsa
08-11-2024 11:21







  1. The Curious World of Doppelgängers
  2. Genetics: the surprising hidden link
  3. And what about personality?
  4. Beyond Similar Faces

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The Curious World of Doppelgängers



Imagina walking down the street and running into someone who looks like your reflection, but isn’t your long-lost brother or distant cousin. Coincidence? Not so fast! It turns out that the phenomenon of doppelgängers, those people who resemble us without sharing a family tree, has deeper roots than we thought.

In October 2024, the “Timothée Chalamet Doppelgänger Contest” in New York attracted a crowd, and not just fans of the actor. Scientists and genetics experts also turned their eyes to this event, intrigued by the similarities among these apparent "twins."


Genetics: the surprising hidden link



Are those just mischievous genes playing hide and seek? A team led by geneticist Manel Esteller from the Josep Carreras Leukaemia Research Institute in Barcelona delved into this question.

Using photographs of documented doppelgängers by photographer François Brunelle as a starting point, Esteller discovered that these "face twins" share more than just their magnificent cheekbones.

Through a study published in Cell Reports, his team found that certain genetic variants, especially in DNA sequences called "polymorphic sites," show up in the bone structure and skin pigmentation of these doubles. What a surprise!

Now, before you decide to search for your genetic clone, consider this: with over 7 billion people in the world, it’s not so far-fetched that some of us share a significant number of genetic variations.

In short, there is a limit to the combinations of faces we can have. So, if you ever come across your doppelgänger, don’t be alarmed, thank the vast global population!


And what about personality?



With such similar faces, one would think that these doppelgängers also share personality traits. But psychologist Nancy Segal from California State University decided to take a closer look.

Using questionnaires that assessed aspects such as extroversion and agreeableness, she found that, although these doubles may be physically similar, their personalities are as diverse as those of any random pair. Apparently, being a clone in appearance does not imply being one in essence.


Beyond Similar Faces



The study of doppelgängers offers more than just entertainment. In medicine, it could help diagnose rare genetic diseases. However, it also raises ethical dilemmas.

Bioethics expert Daphne Martschenko warns about the potential misuse of these technologies, especially in legal and employment contexts. So, before algorithms start deciding our fates, it is essential to reflect on how we use them.

Ultimately, the fascination with doppelgängers reveals not only our genetic connections but also our human desire to find similarities in others. At the end of the day, we all seek a reflection in the world around us.

So, have you found your double yet?



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I have been writing horoscope and self-help articles professionally for over 20 years.

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