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Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.