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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

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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 fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Although average brain size increases gradually though time in H. erectus, individuals with small br Although average brain size increases gradually though time in H. erectus, individuals with small br
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