Audio File   THE LAST GREAT MAMMALIAN MIGRATION This is the period of preglacial land elevation in North America, Europe, and Asia. The land was greatly altered in topography. Mountain ranges were born, streams changed [More]
Audio File   THE AGE OF BIRDS   The great Cretaceous period derives its name from the predominance of the prolific chalk-making foraminifers in the seas. The period brings Urantia to near the end of the [More]