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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
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.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."