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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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Thyroid conditions may make getting pregnant impossible.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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People about to have surgery must tell their health care providers about all supplements they take.

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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

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