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The average adult has about 21 square feet of skin.

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Vaccines prevent between 2.5 and 4 million deaths every year.

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

With tough economic times, a lot of people have lost their jobs—and their homes. If this happens, ... With tough economic times, a lot of people have lost their jobs—and their homes. If this happens, ...
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Cradle the head briefly in both hands to end this section. Cradle the head briefly in both hands to end this section.
A cross section of muscle showing the molecular organization within the muscle fiber. In normal musc A cross section of muscle showing the molecular organization within the muscle fiber. In normal musc
economic question economic question
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Video: New DNA Strand Replication

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