Social history. Social history, often called the new social history, is a field of history that looks at the lived experience of the past. In its golden age it was a major growth field in the 1960s and 1970s among scholars, and still is well represented in history departments in Britain, Canada, France, Germany, and the United States. In the two decades from 1975 to 1995, the proportion of professors of history in American universities identifying with social history rose from 31% to 41%, while the proportion
Peritoneal mesothelioma affects the lining of the abdomen and is the second most common type of mesothelioma. It makes up about 20 percent of all mesothelioma cases. Just like pleural mesothelioma, peritoneal mesothelioma is caused by exposure to asbestos. When someone ingests microscopic asbestos fibers, the tiny sharp particles get embedded in the lining of the abdomen (peritoneum). Over a course of 20 to 50 years, the fibers in the peritoneum cause mutations in the surrounding healthy mesothelial cells.
What causes pancreatic cancer? While it is virtually impossible to tell what caused a specific person to develop pancreatic cancer, there are some important principles of cancer biology that can help us understand why pancreatic cancer develops, and large population-based studies help us understand the many risk factors for this disease.