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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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The human body produces and destroys 15 million blood cells every second.
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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.