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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.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.