If you could remove all of your skin, it would weigh up to 5 pounds.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Structures of a typical cell.
Parts of a typical spark plug.
A typical peak-and-hold fuel-injector waveform. Most fuel injectors that measure less than 6 ohms ...
The typical distribution of neurofibrillary tangles and amyloid plaques in the brains of patients ...
Typical laboratory emergency shower.
Soybean plants in nitrogen-poor soil show how root nodules affect growth. Only the darker green plan