A new study has identified gene variations that determine life expectancy.
In the United States, life expectancy is currently averaged at 78.8 years, according to data from the Centers for Disease Control and Prevention (CDC). They also identify the leading causes of death, naming heart disease, cancer, and chronic respiratory diseases as some of the main culprits.
Scientists have previously looked at our genetic makeup for clues that indicate how long each person is likely to live. However, until now, only two genes had been identified as linked with longevity (defined as living beyond age 85) in humans.