The Relationship Between Doubles and Doppelgangers

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Could it be that the doppelgangers and doubles share anything outside of their physical appearance as well? We have seen that these look alike, they have other similarities beyond the shape of the face. And we have seen in the case of addiction, for example, to smoking and tobacco. These people they share also probably these genes that make them addict to behaviors like tobacco, or yours, etc.

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