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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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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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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
![The geomagnetic polarity time scale shows how Earth’s magnetic pole has changed through geologic tim](https://biology-forums.com/gallery/47/medium_274477_04_02_15_12_24_31_20573922.jpeg)
![Landbridge connections between continental Asia and Indonesia during glacial periods extend as far a](https://biology-forums.com/gallery/47/medium_275510_22_02_15_5_56_55_20768103.jpeg)