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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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

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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Overview of Cell Signaling Overview of Cell Signaling
Patients with Parkinson's disease embroyonic stem cell treatment Patients with Parkinson's disease embroyonic stem cell treatment
What is a stem cell? What is a stem cell?
Structures of a typical cell. Structures of a typical cell.
The responses of an on-center cell to contrast. The responses of an on-center cell to contrast.
Basal cell carcinoma. Basal cell carcinoma.
Video: Supine Position

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