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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.