Scientists uncover fossils suggesting Sahelanthropus tchadensis, a 7-million-year-old ancestor, could walk upright. Could ...

The way Sahelanthropus tchadensis moved has long been debated. The discovery of a small bump on the front of the thigh bone ...

The pelvis is often called the keystone of upright movement. It helps explain how human ancestors left life on all fours behind. Yet the “how” has stayed fuzzy for decades. A new Nature study led by ...

It’s considered to be one of the most decisive steps in human evolution. Now, scientists believe they have pinpointed when our ancestors made the transition from walking on all fours to standing on ...

The oldest distinguishing feature between humans and our ape cousins is our ability to walk on two legs—a trait known as bipedalism. Among mammals, only humans and our ancestors perform this atypical ...

A big difference between humans and other apes is the ability to stride easily around on two feet, with our bodies vertical. Now, a new analysis of some fossil bones shows that adaptations for bipedal ...

All vertebrate species have a pelvis, but only humans use it for upright, two-legged walking. The evolution of the human pelvis, and our two-legged gait, dates back 5 million years, but the precise ...

The chimp with the most human-like gait and body type walked upright more efficiently than he knuckle-walked a finding that study co-author Herman Pontzer calls a snapshot of how this evolution may ...

“For over a hundred years, it was hypothesized that our ancestors lived in grassland savannahs and that this major ecosystem change drove human evolution, including the origins of bipedalism and ...