马,那魁梧的身躯和威武的英姿,多年来一直是诗人吟咏和画家写生的题材。可是马的祖宗——始祖马,却是体型弱小其貌不扬的小兽。始祖马生活在5000万年前的始新世中期,身体只有现代狐狸那么大。它的脊背弯曲,没有壮观的马鬃。现代马一趾着地,便于快跑;始祖马前足四趾,后足五趾,适宜在泥土松软的矮树林里生活。 Horse, that burly body and mighty heroic, over the years has been the subject of poet chanting and painter sketching. However, the ancestor of the horse - the first Zuma, but it is small and small appearance of the small beast. The ancestral zuma lived 50 million years ago in the mid-Eocene, the body is only as large as a modern fox. It’s curved back, not spectacular horse’s mane. Modern horse one toe, easy to run; first ancestral horse four feet toe, hind foot five toe, suitable for living in the soft, soft woods.