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Did you know?
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).
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
Did you know?
By definition, when a medication is administered intravenously, its bioavailability is 100%.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.