Sleep may be a key reason why your personality traits play an important part in how long you are likely to live, suggests a new study (n=3,759) which found that certain personality characteristics are more likely to sleep too little, or too much, and these have known links with various health risks.

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Sleep may be a key reason why your personality traits play an important part in how long you are likely to live, suggests a new study (n=3,759) which found that certain personality characteristics are more likely to sleep too little, or too much, and these have known links with various health risks.