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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.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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On average, the stomach produces 2 L of hydrochloric acid per day.

Overview of gas exchange between the environment, blood, and cells. Overview of gas exchange between the environment, blood, and cells.
These young children are taking the initiative to explore their environment as they examine a snail These young children are taking the initiative to explore their environment as they examine a snail
Testing Infants’ Knowledge Testing Infants’ Knowledge
A question for grade 11 math A question for grade 11 math
An 8th grade class develops a linear model that predicts the number of cheerios (a small round ... An 8th grade class develops a linear model that predicts the number of cheerios (a small round ...
The gas division of Power-U-Up plans to introduce a new gas delivery system based on the ... The gas division of Power-U-Up plans to introduce a new gas delivery system based on the ...
Video: Oral Hygiene & Braces Animation

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