A new study appearing in a National Academy of Sciences journal found that apes may be unhappy in the middle of their lives. (Source: CNN)-
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(CNN) - Humans aren't the only ones who go through mid-life
crises.
Scientists now believe chimpanzees and orangutans do too.
An international study found the apes have the same U-shaped
curve of happiness linked to mid-life crisis in humans.
The chimps and orangutans were happiest when young and in
old age, but their happiness took a dip in the middle of their lives.
The study appears in the journal Proceedings of the National
Academy of Sciences.
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