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Did you know?

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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Thyroid conditions may make getting pregnant impossible.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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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.

Some male birds and mammals congregate in communal courting grounds called leks. Some male birds and mammals congregate in communal courting grounds called leks.
The Distribution of the World's Land and Population The Distribution of the World's Land and Population
Cenozoic Era: Age of Mammals Cenozoic Era: Age of Mammals
Sea and Land Breezes Sea and Land Breezes
Important Land Ecoregions Important Land Ecoregions
Video: Hip Animation

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