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Everybody knows a healthy sex life is important for a good marriage. But keeping the spark in the bedroom may be even more crucial for older couples dealing with chronic illness.
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An aging tree's girth is good for the planet, scientists say, because it helps it suck more carbon dioxide out of the air. "It's as if, on your favorite sports team, you find out the star players are a bunch of 90-year-olds," one ecologist says.