title: Topological inconsistency of continental drift on the present-sized Earth.
abstract: Certain continents have in the past moved with respect to each other in a manner clearly implied by sea-floor spreading and other data. However, the resulting collective motion of all the continents was apparently not topologically possible on the present-sized earth. An expanding earth might resolve this difficulty.
authors.forename: R
authors.initials: R
authors.lastname: Meservey