The Probability of Having a Doppelganger

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Manel Estella: The probability is extremely high, that you have somebody that looks almost identical to you. Of course, all of us who have a face that is more or less average - then it's more likely to have a look alike. If you want to see some photos of the doppelgangers in the study, there's a link on the podcast webpage at theguardian.com.

The thing about doppelgangers is that despite looking almost identical, they aren’t biologically related. So, what makes them appear so similar? How do totally different people end up with the same face? And, can studying doppelgangers tell us anything about the age-old question of nature v nurture? Madeleine Finlay speaks to Dr Manel Esteller to find out. Help support our independent journalism at theguardian.com/sciencepod