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 Broken Ear and discovers the Arumbaya tribe deep in the forest. "The Broken Ear" was a commercial success and was published in book form shortly after its conclusion. Hergé continued "The Adventures of Tintin" with "The Black Island", while the series itself became a defining part of the Franco-Belgian comics tradition. In 1943, "The Broken Ear" was coloured and reformatted for republication by Casterman. "The Broken Ear" introduces the recurring character General Alcazar, and was the first to include fictional countries. The story was adapted for both the 1956 Belvision animation, "Hergé's Adventures of Tintin", and for the 1991 Ellipse/Nelvana animated series