Darwin would make good use of the homologies analyzed by Owen in his own theory, but the harsh treatment of Grant, and the controversy surrounding Vestiges, showed him the need to ensure that his own ideas were scientifically sound.
Darwin faría despois bo uso das homoloxías analizadas por Owen na súa propia teoría, pero o duro tratamento dado a Grant, e a controversia que rodeou a Vestiges, mostroulle a necesidade de asegurarse de que as súas propias ideas eran cientificamente sólidas.