Scientists have discovered a group of people in Ecuador with a rare gene mutation that could reveal ways to extend the human life span.

科学家在一群厄瓜多尔人身上发现了一种罕见的基因突变，有望据此揭开长寿的谜底。

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Nearly 30 years ago James Fries at Stanford University School of Medicine put a ceiling of 85 years on the average potential human life span.

约30年前，斯坦福大学医学院的James Fries把人类平均寿命的可能上限定为85岁。

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The human life span puts boundaries on the subject matter that we collect with oral history.

人类生命的跨度给我们搜集口述历史资料的主题设置了疆界和范围。

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In the past 100 years, the human life span has increased 65%, to 78 years.

FORBES: Pay Death To Go Away

Will it bring closer the day when biochemistry extends the human life span and makes it healthier and more productive?

FORBES: A hail of silver bullets

But for many, the evidence that low-calorie diets can extend life has remained tantalizing--especially if, as Walford proposed, it was likely to boost the human life span to 120 years or more.

FORBES: Starvation--And Long Life--In A Pill?