This is the story of Ardi (Ardipithecus ramidus), one of our special ancestors called hominis. The discovery of her ...

Early human ancestors may have learned to walk upright on two legs up in the trees rather than on the firm ground of Africa's ancient savannah. A first-of-its-type study led by researchers at the Max ...

Humans' ability to walk upright on two legs may have evolved in trees, rather than on the ground, according to scientists studying wild chimpanzees in Tanzania. This contradicts the widely accepted ...

Two small genetic changes reshaped the human pelvis, setting our early ancestors on the path to upright walking, scientists say.

The skeleton was discovered in 1994 in the Ethiopian Desert and belonged to the species Ardipithecus ramidus. Further investigation revealed that Ardi could walk upright like humans, but had ape-like ...

Genetic tweaks allowed early humans to stand, balance and walk on two legs instead of moving on all fours like other primates, according to researchers.

WASHINGTON (AP) -- Maybe walking upright on two legs isn't such a defining human feature after all. Scientists who spent a year photographing orangutans in the rain forest say the trait probably ...

Reconstruction of the locomotion and paleXiaocong Guo and Xijun Ni, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences. Our ability to walk upright is among the ...