The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
Team of geologists collecting samples for paleomagnetic analysis at Sangiran, Java.
A Memory Task for Intelligence Testing
Ernest Meissonier, Memory of Civil War (The Barricades).
Memory: Navajo Paintings
Memory Analogy
If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ...