Anthropology: Did the ancestors of humans learn to walk in Europe?
Fossils of a primate from Bulgaria suggest that it walked upright on two legs, challenging the notion that the human lineage originated solely in Africa.
The first bipedal walker may have been a human ancestor that lived in the Balkans
Recent findings in Bulgaria suggest that the first human ancestor to walk on two legs may have lived in Europe rather than Africa.
Biology: Why Are Women's Pelvises Not Broader?
Researchers investigate the evolutionary reasons behind the narrowness of the female pelvis, suggesting it balances childbirth difficulty with bipedalism efficiency.
The oldest known hominid walked on two legs seven million years ago
Researchers continue to debate the evolutionary significance of Sahelanthropus tchadensis, the ancient hominid that lived seven million years ago and displayed bipedalism.
A seven million-year-old femur reignites a long and fierce scientific war over the origin of bipedalism
A new study identifies three traits of upright walking in 'Sahelanthropus tchadensis', the oldest known hominin, but critics dispute the evidence, claiming it was a quadrupedal ape.