Figure B Back view of 40 million-year-old Mesohippus' Metacarpal (IMAGE)
Caption
Back view of 40 million-year-old Mesohippus' metacarpal. While three fully formed toes are visible, the researchers contend that ridges on the side of the toes represent the two missing digits, and that therefore, all 5 digits are expressed.
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NYITCOM
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