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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
There are approximately 3 million unintended pregnancies in the United States each year.
Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.