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Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

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

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There are 60,000 miles of blood vessels in every adult human.

Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the
Hershey Chase Experiment Hershey Chase Experiment
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The Milgram Obedience Experiment The Milgram Obedience Experiment
Video: Electrical changes in the heart

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