Key points from article :
Identical twins are less likely to die young from unexpected causes.
10% more likely to survive into their 60s.
Possibly due to material help and emotional support from their twin.
In later years genetic factors become more important.
University of Washington in Seattle examined data on Danish twins born between 1870 and 1900.
Compared their fate with the general population from the same time.
The study was published in the PLOS One journal.
