Is longevity determined by lifestyle or genetics? To explore these factors, NBC News looked to Iceland, which has an average life expectancy of about 83 years, one of the highest in the world.


Is longevity determined by lifestyle or genetics?
To explore these factors, NBC News looked to Iceland, which has an average life expectancy of about 83 years, one of the highest in the world.
Residents there have long been known to maintain healthy habits--their diets typically consist of fish rich in Omega-3 fatty acids and food that is largely grown on family farms.