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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Illicit drug use costs the United States approximately $181 billion every year.