traction in their precarious habitats.

Evolution

It is speculated by paleontologists that during the Eocene period hooved marsh dwellers carried their body weight mainly on two of the middle toes, which grew to equal size, becoming the Artiodactyla or even-toed hooved animals. Before the end of the Eocene period the side toes of some had dwindled and practically disappeared (mainly in the form of a dewclaw) while the basal

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