(<em>Strongylocentrotus purpuratus</em>,
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, bottom) die after about 50 years. ~~ From top: C. Shuster; ? Hans Hillewaert/Wikimedia Commons (<a href="BY-SA 4.0</a>); C. Shuster" />The difference in the species’ life spans might be due to different rates of aging,
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, thought aging researcher Andrea Bodnar at the Bermuda Institute of Ocean Sciences in St. George’s and developmental biologist James Coffman of the MDI Biological?Laboratory in Salisbury Cove,
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, Maine. Instead,
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, they found,
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, none of the species seem to age at all. Young and old members of each species are similar in their abilities to reproduce and to regenerate spines and tube feet, the researchers reported online April 20 in Aging Cell. Even though the short-lived variegated urchins have no signs of slowing down,
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, they still die. Why is a mystery,
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, Coffman says.
Ways to be wellderly
A similar paradox is also seen in “wellderly” people that geneticist Ali Torkamani has been studying at the Scripps Research Institute in La Jolla,
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, Calif. About eight years ago, Torkamani started bringing in people over 80 who had made it to an advanced age without any sign of chronic disease. The idea was to study their DNA and learn the secrets of healthy aging.
Despite living healthy, the wellderly didn’t carry genetic variants connected with extremely long lives, Torkamani and colleagues discovered. The wellderly also had no genetic advantage when it comes to cancer, stroke or diabetes. What they did have was a lower risk of getting Alzheimer’s and heart disease. Each of the wellderly

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