Show EVOLUTION E I THE MAMMOTHS T pIE DIE 1 By p Percy W. W V Cobb n. n B S. S M M. D. D. D 1 2 3 4 I I Illy s 1 EVOLUTION OF THE HORSE With the evolution of the mammal came two Important causes that brought about the extinction of ot the mammoths and other giants of a mil mul- mullion million lion years ago and the rise of a more pliable and more highly developed form Corm of animal lire life The first cause was another series of earth and temperature changes from equatorial to arctic conditions through four long drawn long drawn stages lasting thousands thousand of oC years each Only the tho continent of Africa I seemed s emed to have been free from these enormous sweeps of ot ice from the north for today we still see the decadent offspring of ot the mammoths ol ot old in the elephant the rhinoceros and hippopotamus The second cause was the failure of the larger animals in the battle against infectious diseases Insects Infested the tho regions in which these animals roamed and spread infection and death so rapidly that few tew species could survive onslaught I These causes however worked toward the evolution of a new type i of ot animal ancestor to the modern mammal That was between and years ago when the progenitor of or man appeared with the toed four ancestor of oC the modern horse and the tho toothed saber forerunner of the cat nt I s I |