In Mobile, Carnival is more than an indulgent holiday. Shoppers standing in a crosswalk, during Black Friday in New York, Nov. 27, 2015. Skip to ... National Geographic Headquarters 1145 17th Street NW Washington, DC 20036 ABOUT. In the 1900s, the population of black rhinoceroses began to decline due to hunting and habitat loss. On October 29, 1929, the United States stock market crashed in an event known as Black Tuesday. Its time-honored traditions have been passed through generations since the turn of the 18th century. The black rhinoceros (Diceros bicornis) is listed as critically endangered by the International Union for Conservation of Nature (IUCN).This species of rhino is found primarily in South Africa, Namibia, Tanzania, Zimbabwe, and Kenya. On October 29, 1929, the United States stock market crashed in an event known as Black Tuesday.