One Step Closer to Living Longer
D: You know, when I watch futuristicsci-fi movies, I notice everyone has anormal aging pattern. You don't encounter people who just having been107 yearsold. That's probably a mistake.
Y: A mistake? Why?
D: Because science is giving us longerlifespans all the time. Researchers these days are even starting to understandhow the body sends signals to itself, determining how it ages.
Y: Now, that sounds like sciencefiction
D: It's true. A study conducted byJames Carey and his colleagues at the University of California, for example,found a link between how long a mouse lives and its ovaries.
Y: Its ovaries? What do they have to dowith the aging?
D: The researchers removed the ovariesof one set of mice when they were a few weeks old. Those mice didn’t live as long asmice who still had their ovaries. Another group of mice had their ovariesremoved but got young ones later.
The mice with the young ovariesimplanted into them lived forty percent longer than the ones who kept theiroriginal ovaries, and sixty percent longer than the ones with no ovaries atall!
Y: Yalza! Sixty percent longer！？
D:Some chemical message is being sentfrom the ovaries to the rest of the body, telling it what stage of life it isin. By renewing their ovaries, the scientists were essentially able to set theclock back.
Y: So who wants mice to live longer?
D: Mice are just test. If we couldunderstand how the body tells itself to age, maybe we could make other specieslive longer…like people.
D: 这可是真的。比如说吧，加利佛利亚大学的James Carey和他的同事们进行了一项研究，他们发现老鼠的寿命和它的卵巢有很大关联。
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You Embrace the Challenge People who consider themselves self-disciplined, organized achievers live longer and have up to an 89% lower risk of developing Alzheimer’s than th