Florida Museum of Natural History

To illustrate how the horse foot changed through time, a human hand can be used for comparison.

Note how the distance of the wrist bones from the ground changes.

WRIST

changes in feet

WRIST

hands
  5 toes (ancestral mammals) 4 toes on ground (eohippus stage) 4 toes, 3 toes on ground, 1 raised above (Epihippus stage) 3 toes (Mesohippus stage) 1 toe (Equus stage)
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