Evolution of the horse, c1920. Diagram of seven stages in the development of hind and forelimbs: 1, 1A Eohippus; 2, 2A Orohippus; 3, 3A Mesohippus; 4, 4A Hypohippus; 5, 5A Merychippus; 6, 6A Hipparion; 7, 7A modern horse. Over time the toes shorten and disappear. | |
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Crédit: | Science Photo Library / Heritage Images / Oxford Science Archive |
Taille de l’image : | 3796 px × 4600 px |
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