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One of the most important factors about people's lives is the information of, the use of, and the growing knowledge of medicine. Medicine is a science that nations all over the world use. It is a science because it is based on knowledge gained through careful st ....

Middle of Essay
.... from disease since they first appeared on the earth about two and one -half million years ago. Throughout most of this time, they knew little about how the human body works or what causes disease. But medicine has gone through many stages throughout history. In prehistoric times, people believed that angry gods or evil spirits caused disease. To cure the sick, the gods had to be pacified or the evil spirits driven from the body. In time, this task became the job of the first "physicians".3 The first - known surgical treatment was an operation called trephining. Trephining involved use of a stone instrument to cut a hole in a patient's skull. ....