title: Evolution: Fossil Ears and Underwater Sonar.
abstract: A key innovation in the history of whales was the evolution of a sonar system together with high-frequency hearing. Fossils of an archaic toothed whale's inner ear bones provide clues for a stepwise emergence of underwater echolocation ability.
authors.affiliation: D.O. Terre et Histoire de la Vie, Institut Royal des Sciences Naturelles de Belgique, 29 rue Vautier, Brussels, 1000, Belgium. Electronic address: olivier.lambert@naturalsciences.be.
authors.forename: Olivier
authors.initials: O
authors.lastname: Lambert
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004423:Ear / Q000033:anatomy & histology; D004455:Echolocation; D005580:Fossils; D014907:Whales