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There are more sensory neurons in the tongue than in any other part of the body.
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.
Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.