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Author Question: A qanat is an irrigation system, developed in Iran, that taps into groundwater through a series of ... (Read 29 times) |
The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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).
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.