Multiple sclerosis (MS), also known as disseminated sclerosis or encephalomyelitis disseminata, is a demyelinating disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged.ultiple sclerosis is the most common autoimmune disorder affecting the central nervous system. As of 2008, between 2 and 2.5 million people are affected globally with rates varying widely in different regions of the world and among different populations. In 2013, 20,000 people died from MS, up from 12,000 in 1990.
Calamities of the 20th and 21st centuries. CBC Arts Posted: May 08, 2008 12:44 PM ET Last Updated: Aug 30, 2010 2:17 PM ET. The following is a list of some of the worst natural calamities to strike the world since 1900. The list is by definition arguable. Earthquakes, volcanic eruptions, tsunamis, cyclones, hurricanes and other storms are all clearly natural phenomena. But the picture is less clear for disasters like floods and famine.
U.N. Study: Natural Disasters Caused 600,000 Deaths Over 20 Years. Natural disasters have killed more than 600,000 people and left behind trillions of dollars in damages in the last two decades, the United Nations said Monday.