y to a large draft horse. There is a skeleton mounted in the Yale Museum that stands fifteen hands high and is said to have “somewhat the proportions of a western broncho, but with a very large head and with teeth greater than the modern dray horse…”(Wyman 20). This one-toed animal roamed not only the North and South American continents but also Europe and Asia. Evolutionary data shows the gradual change in bones, teeth, and the skeleton of the horse, as well as the development of special parts of the body affecting its ability to run and eat. It is unknown why the horse disappeared in North and South America but not in Asia. There are several theories, but none seem to hold as it is evident from the amazing way in which the few imported horses multiplied and spread, that the environment was right. We therefor look to other reasons of extinction such as insect-transmitted disease. It is likely that we would be without horses at all had there not been a migration of the prehistoric horse to Africa and Asia, where the line continued
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