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Did you know?

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

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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Cyanide works by making the human body unable to use oxygen.

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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.

Radio Frequency Lesion Radio Frequency Lesion
Organization of Spatial Frequency Organization of Spatial Frequency
Characteristics of Sound: Frequency and Amplitude Characteristics of Sound: Frequency and Amplitude
Both the top and bottom pattern have the same frequency. However, the amount of on-time varies. Both the top and bottom pattern have the same frequency. However, the amount of on-time varies.
The relationship between maternal age and the frequency of trisomy 21 (Down syndrome). The risk incr The relationship between maternal age and the frequency of trisomy 21 (Down syndrome). The risk incr
The frequency of bipolar illness in members of monozygotic twin pairs and in first-degree relatives The frequency of bipolar illness in members of monozygotic twin pairs and in first-degree relatives
Video: Metaphase I Animation

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