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Author Question: The early Earth separated into different layers as a result of differentiation. What were the three ... (Read 164 times) |
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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).
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.