Cancer Overview. Cancer, also called malignancy, is an abnormal growth of cells. There are more than 100 types of cancer, including breast cancer, skin cancer, lung cancer, colon cancer, prostate cancer, and lymphoma. Symptoms vary depending on the type. Cancer treatment may include chemotherapy, radiation, and/or surgery.
Points of View Reference Center provides a balance of materials from all viewpoints with main essays, leading political magazines from all sides of the political spectrum, newspapers, radio and television news transcripts, primary source documents and reference books.
An inertial frame of reference is a reference frame, i.e. point of view, where the property of inertia holds true. A non-inertial frame of reference is the reference frame where the property of inertia does not seem to hold true.