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Author Question: The blue color of the sky is due to ____. a. selective scattering of visible light by air ... (Read 148 times) |
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Illicit drug use costs the United States approximately $181 billion every year.
In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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).
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.