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Lack of sleep encourages risky decisions due to an excess of optimism, according to a study by the Duke University Medical Center in Durham (United States) published in the latest issue of the journal 'Journal of Neuroscience'.

A team of researchers from Allergheny College in Pennsylvania (USA) has shown that taking a daily nap of at least 45 minutes reduces the blood pressure of those who have suffered a stressful day with a lot of psychological tension.

Do your sheets stick and you have a terrible time opening your eyes every morning? A group of American researchers from Northwestern University could have identified the gene that, when absent, makes it so difficult for some people to leave sleep behind when they wake up.

After analyzing the DNA of a family for four generations, researchers at the University of Washington School of Medicine (USA) believe they have discovered certain alterations in the genetic code that cause some people to sleepwalking.

To look attractive and healthy, it is best to sleep well at night, according to a study by the Karolinska Institute in Stockholm (Sweden) that is published in the special Christmas issue of the 'British Medical Journal' and which they have christened "Bella. Sleeping".

In the busy life of a honey bee swarm, workers periodically need a good night's sleep. If they do not rest, they fail to adequately communicate the food situation to their hive mates, a study by the University of Texas has just shown.

When we sleep with the light or television on, the risk of depression increases, according to a study by Ohio State University (USA) presented at the last annual meeting of the American Neuroscience Society in San Diego.

Do you find it difficult to get to sleep at night and do you wake up tired in the morning? A new study from the Center for Sleep Disorders at Northwestern University reveals that the best antidote to chronic insomnia is aerobic exercise.