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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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).
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.