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Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
![Extinction and immigration of bird species on the California Channel Islands between 1917 and 1968 (](https://biology-forums.com/gallery/47/medium_33_19_02_12_5_42_32_20691962.jpeg)
![When horses lie down to sleep, others in the herd remain standing, awake or in a light doze, keeping](https://biology-forums.com/gallery/47/medium_27581_22_04_12_4_33_29.jpeg)