text: Archaeologist finds earliest tools used by non-human apes
  
  February 14, 2007 
  
  Archaeologist Julio Mercader at the University of Calgary has discovered hammer-like tools dating back 4300 years. The tools are thought to have been used by non-human primates to crack nuts. 
  The large size of the stones are of too great a weight to have been favoured as tools by humans. Further, humans are not believed to have been in that area at that time for the primates to have learned from them by observation. 
  Mercader suggests that this implies the primates learned to use the tools either independently of humans or else by a common ancestor (of common descent).
tokens: Archaeologist finds earliest tools used by non - human apes February 14 , 2007 Archaeologist Julio Mercader at the University of Calgary has discovered hammer - like tools dating back 4300 years . The tools are thought to have been used by non - human primates to crack nuts . The large size of the stones are of too great a weight to have been favoured as tools by humans . Further , humans are not believed to have been in that area at that time for the primates to have learned from them by observation . Mercader suggests that this implies the primates learned to use the tools either independently of humans or else by a common ancestor ( of common descent ) .
nps.text: Archaeologist
nps.id: np0
nps.text: earliest tools
nps.id: np1
nps.text: non-human apes
nps.id: np2
nps.text: Archaeologist Julio Mercader
nps.id: np3
nps.text: the University of Calgary
nps.id: np4
nps.text: hammer-like tools
nps.id: np5
nps.text: The tools
nps.id: np6
nps.text: non-human primates
nps.id: np7
nps.text: nuts
nps.id: np8
nps.text: The large size
nps.id: np9
nps.text: the stones
nps.id: np10
nps.text: too great a weight
nps.id: np11
nps.text: tools
nps.id: np12
nps.text: humans
nps.id: np13
nps.text: humans
nps.id: np14
nps.text: that area
nps.id: np15
nps.text: that time
nps.id: np16
nps.text: the primates
nps.id: np17
nps.text: them
nps.id: np18
nps.text: observation
nps.id: np19
nps.text: Mercader
nps.id: np20
nps.text: the primates
nps.id: np21
nps.text: the tools
nps.id: np22
nps.text: humans
nps.id: np23
nps.text: a common ancestor
nps.id: np24
nps.text: common descent
nps.id: np25
nps.text: Calgary
nps.id: np26