Why mammal ears went on the move.
D000818:Animals; D005075:Biological Evolution; D001921:Brain / Q000033:anatomy & histology / Q000254:growth & development*; D004429:Ear Ossicles / Q000033:anatomy & histology / Q000254:growth & development; D004432:Ear, Middle / Q000033:anatomy & histology* / Q000254:growth & development; D006309:Hearing; D008322:Mammals / Q000033:anatomy & histology*; D010163:Paleontology