Morphological affinities of the Australopithecus afarensis hand on the basis of manual proportions and relative thumb length.

@article{Alba2003MorphologicalAO,
  title={Morphological affinities of the Australopithecus afarensis hand on the basis of manual proportions and relative thumb length.},
  author={David M. Alba and Salvador Moy{\`a}-Sol{\`a} and Meike K{\"o}hler},
  journal={Journal of human evolution},
  year={2003},
  volume={44 2},
  pages={
          225-54
        }
}
The hands of apes and humans differ considerably with regard to proportions between several bones. Of critical significance is the long thumb relative to other fingers, which is the basis for human-like pad-to-pad precision grip capability, and has been considered by some as evidence of tool-making. The nature and timing of the evolutionary transition from ape-like to human-like manual proportions, however, have remained unclear as a result of the lack of appropriate fossil material. In this… 
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