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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).
Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
There are more bacteria in your mouth than there are people in the world.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.