Debra Bruno The Washington Post

Looking at 400 million people born between 1800 and 1920, whose information had been collected from public family trees in Ancestry.com, investigator Graham Ruby found that only about 10 percent of human longevity is inherited.

Looking at 400 million people born between 1800 and 1920, whose information had been collected from public family trees in Ancestry.com, investigator Graham Ruby found that only about 10 percent of human longevity is inherited.