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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.
There are more bacteria in your mouth than there are people in the world.
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
People about to have surgery must tell their health care providers about all supplements they take.
Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.