"The squirrels in my neighborhood have a 25-year life span, but they look like rats that live two years, " said Gary Ruvkun, a pioneer in aging biology at Harvard Medical School.

“在我家附近生活的松鼠有25年的寿命，但和它们看起来长得差不多的老鼠只能活两年，”衰老生物学研究领域的先驱、来自哈佛医学院的加里·鲁夫库恩（Gary Ruvkun）说。

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Gary Ruvkun, a Harvard molecular biologist, has been trying to figure out ways of designing space probes that could test the idea for years.

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