The global carbon cycle is now usually divided into the following major reservoirs of carbon interconnected by pathways of exchange: 1  The atmosphere. 2  The terrestrial biosphere. 3  The oceans, including dissolved inorganic carbon and living and non-living marine biota.
Elizabeth Blackwell: First Woman M.D. (Barnard Biography Series, Vol. 2) Mar 1, 1997
Most often remembered as the first American woman to receive an M.D. degree, Dr. Elizabeth Blackwell worked tirelessly to secure equality for all members of the medical profession. Most often remembered as the first American woman to receive an M.D. degree, Dr. Elizabeth Blackwell worked tirelessly to secure equality for all members of the medical profession. Full Episode Tuesday, Jan 16