Takes the same shape of the plant or animal. The space is sometimes filled with mud. The mud hardens and turns into rock. Cast are often made from a mold. The inside of the sedimentary rock isn't hollow.
American Bandstand, 1957. Dick Clark became host of the locally-produced Bandstand in 1956, just before the show was renamed American Bandstand, shortened to ninety minutes, and expanded to a national ABC audience on August 5, 1957.
Richard Marlin Perkins (March 28, 1905 â June 14, 1986) was an American zoologist best known as a host of the television program Mutual of Omaha's Wild Kingdom from 1963 to 1985. Contents.