Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
How to solve an exponential growth problem involving bacterial growth (Question 1)
