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Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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The longest a person has survived after a heart transplant is 24 years.
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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.
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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.