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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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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

The four ways in which animals exchange heat with the environment are radiation, evaporation, convec The four ways in which animals exchange heat with the environment are radiation, evaporation, convec
There are multiple pathways for heat exchange between organisms and the environment. There are multiple pathways for heat exchange between organisms and the environment.
A fossil leaf in low-grade coal A fossil leaf in low-grade coal
Effect of pH on drug absorption: (a) a weak acid such as aspirin (ASA) is in a nonionized form in an Effect of pH on drug absorption: (a) a weak acid such as aspirin (ASA) is in a nonionized form in an
Facility Emergency Response Plans. Courtesy of Chris Weber, Dr. Hazmat, Inc. Facility Emergency Response Plans. Courtesy of Chris Weber, Dr. Hazmat, Inc.
Prepare for weekend plans when hours feel like minutes Prepare for weekend plans when hours feel like minutes
Video: Definition of heart rate

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