Audio File THE AGE OF EARLY MAMMALS   50,000,000 years ago, the land areas of the world were very generally above water or only slightly submerged. The formations and deposits of this period are both land [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]