Are active centers of galaxies that radiate powerful x-rays visible across the universe

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

wavelegth as in spectrum red oygbiv

conservation of mass

mass before something happens = mass afterwards