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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

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The longest a person has survived after a heart transplant is 24 years.

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There are more bacteria in your mouth than there are people in the world.

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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Adaptations to the Environment Adaptations to the Environment
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Testing Infants’ Knowledge Testing Infants’ Knowledge
Video: Interpreting a cladogram Animation

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