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Did you know?

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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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Aggregates are people who happen to be in the same place at the same time. Aggregates are people who happen to be in the same place at the same time.
U.S. suburbs were once unplanned, rambling affairs that took irregular shapes as people moved away ... U.S. suburbs were once unplanned, rambling affairs that took irregular shapes as people moved away ...
The steps in the hearing process. (1) Sound waves enter the outer ear and travel through the ear ... The steps in the hearing process. (1) Sound waves enter the outer ear and travel through the ear ...
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Sensory Crossover Device for Visually Impaired People Sensory Crossover Device for Visually Impaired People
The distribution of the number of hours that a random sample of people spend doing chores per ... The distribution of the number of hours that a random sample of people spend doing chores per ...
Video: Ventilation - phases and driving forces

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