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Ples is the popular nickname for the most complete skull of an Australopithecus africanus specimen ever found in South Africa
then Secretary of the Smithsonian Institution
�sow bugs�
14 to 23 Million Years
The specific name honoured the late Makela
Megalonyx jeffersoni, ground sloth skeleton Triceratops Ples is the popular nicknamePresident, Thomas Jefferson, scientifically described fossil bones given to him by saltpeter miners found in a Monroe County cave in 1797. Jefferson thought they were the claws of a giant cat. In 1799 Casper Wistar re described the bones as a new species of extinct giant ground sloth and named it in honor of President Jefferson. Only recently have the bones been Carbon 14 dated at over 38,000 year old. On March 8, 2008 Megalonyx jeffersoni became the
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