Cnidaria is a phylum within Kingdom Animalia which consists of hydras, jellies (or jellyfish), sea anemones, and corals. All cnidarians are radially symmetrical, and there are two main radially symmetrical body types.
The stock market crash, on black Tuesday (October 29, 1929) began the Great Depression.
The Great Depression in the United States began on October 29, 1929, a day known forever after as âBlack Tuesday,â when the American stock marketâwhich had been roaring steadily upward for almost a decadeâcrashed, plunging the country into its most severe economic downturn yet.