The familiar sounds of your heart are made by the heart's valves as they open and close.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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The average office desk has 400 times more bacteria on it than a toilet.
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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
A hypothetical hybrid zone.
The Central Dogma of Genetics
Superior orbital fissure
Inferior orbital fissure
Selected Central Nervous System Neurotransmitters and Their Functions
In 1994 a team of German physicists created an atom of Element 110. If the atom