Origin of human bipedalism as an adaptation for locomotion on flexible branches.

@article{Thorpe2007OriginOH,
  title={Origin of human bipedalism as an adaptation for locomotion on flexible branches.},
  author={Susannah K. S. Thorpe and Roger L. Holder and Robin H. Crompton},
  journal={Science},
  year={2007},
  volume={316 5829},
  pages={1328-31}
}
Human bipedalism is commonly thought to have evolved from a quadrupedal terrestrial precursor, yet some recent paleontological evidence suggests that adaptations for bipedalism arose in an arboreal context. However, the adaptive benefit of arboreal bipedalism has been unknown. Here we show that it allows the most arboreal great ape, the orangutan, to access supports too flexible to be negotiated otherwise. Orangutans react to branch flexibility like humans running on springy tracks, by… CONTINUE READING

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