People who live the longest share these personality traits

Decades of research have linked specific personality traits to a longer life expectancy. Some of them - from friendliness to emotional stability - may be written into our genes.

And while one study found that we're not particularly good at identifying these traits in ourselves, it suggested that our close friends are often spot-on.

Read on (preferably with a friend) to find out if you possess any or all of these characteristics: