Scientists have found that people with similar genetics can share positions in the genome just by random chance. This happens because right now, a lot of people in the world is close to 8,000 million and our DNA has 6,000 million components. What they do in their lives is what can create changes between them. And also, this can be even greater as they age.
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