Middle ear to sounds of higher frequency, because these are better taken up by the inner ear (which also responds to higher frequencies than those of non-mammals). The malleus, or "hammer", evolved from the articular bone of the lower jaw, and the incus, or "anvil", from the quadrate. In other vertebrates, these bones form the primary jaw joint, but the expansion of the dentary bone in mammals led to the evolution of an entirely new jaw joint, freeing up the old joint to become part of the ear. For a period of time, both jaw joints existed together, one medially and one
The Anvil (magazine) The Anvil (magazine) The Anvil was an American literary and political activist magazine edited by Jack Conroy in the 1930s. The magazine had a leftist stance and was subtitled "Stories for Workers." According to Douglas C. Wixson, its story "would make an important chapter in the history of American literature if the 1930s were properly recognized in standard textbooks." "The Anvil" was first published out of Moberly, Missouri in May 1933 ("ib".). Among the authors whose works appeared in the magazine were Richard Wright, Nelson Algren, Erskine Caldwell, Frank Yerby and Maxim Gorky. In 1935, "The Anvil" was folded into