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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
Illicit drug use costs the United States approximately $181 billion every year.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.