An outgrowth of this study has added considerably to our 

 knowledge of the Pliocene and Pleistocene history of the horse 

 family. Excellent evidence is provided that the true horse, as we 

 know it, did not originate in North America, as has always been 



DURING FIFTY-FIVE 

 MILLION YEARS 

 OF EVOLUTION 



HORSES BECAME LARGE 



HORSES TEETH 

 -S6CAM6 COMPLEX 



*j&* 





HORSES TOES WERE REDUCED 

 FROM THREE TO OME 



THE HORSE 5 FACE BECAME LOMC 



Fig. 13. This colorful new exhibit illustrates the way in which changes in the 

 structure of the horse have gone hand in hand with changes in its environment 

 (Hall 38). 



believed. Instead it seems that an ancestral group of horses migrated 

 to Asia over the Bering Strait (which was dry land and warm at that 

 time). There the group continued in its evolutionary path to give 

 rise to Equus, our living horse. From this Asiatic birthplace the true 

 horse then spread throughout Eurasia and to North and South 



-48- 



