1. We think about the evolution of bipedalism as one of first events that led hominids down the path to being human.

2. This form developed bipedalism and other adaptations to the newly opening arid savannah landscape and eventually became the ancestor of man.

3. Two critical advances were bipedalism and encephalization.

4. Bipedalism made the human form of birth possible.

5. Bipedalism - walking on two feet - is one of the defining characteristics of being human, and scientists have debated for years how it came about.

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6. But two-leggedness — bipedalism — may well be the place to start the story of human evolution.

7. The debate over the origins of human bipedalism has been argued since Charles Darwin's day, dividing into two competing models.

8. "Bipedalism challenges stable postures, because the abdomen expands in front of the body as the baby grows, " said Katherine Whitcome, an anthropologist at Harvard University.

9. Known as bipedalism, our habitual upright posture is unique in the animal kingdom and has arisen through specific complementary adaptations of the body and brain.

10. Also, she was capable of walking on two feet despite living in an area of woodland and forest — a finding that downplays the importance of open grasslands to the evolution of human bipedalism.

11. Jungers, is "to identify what precipitated the change from this ancient and successful adaptation of upright walking, and climbing, to our own obligate form of bipedalism."

1. We think about the evolution of bipedalism as one of first events that led hominids down the path to being human.