The researchers discovered that identical twins in Denmark tend to lived longer compared to fraternal twins, and both types of twins usually outlived men and women in Denmark who were not twins. The results of the study were published in the journal PLOS ONE.
The scientists believe that the longevity boost in identical twins is a result of social bonds between two siblings.
The close relationships between twins act as a buffer for risky behaviours during their lives and can provide a source of emotional or financial support.
For the study, the team analyzed data from the Danish Twin Registry, which is one of the longest-running databases on twins in the world.
More details here.